Medium Blue #0000CD
Medium Blue is a dark, vivid blue with hex code #0000CD and RGB rgb(0, 0, 205).
Aa
White text reads best on this color (11.16:1).
About this color
#0000CD is a dark, vivid blue. In OKLCH its lightness is 38%, its chroma 0.266 and its hue 264°. Its hue sits on the cool side of the wheel. It is the named color Medium Blue. White text reads best on it, at 11.16:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | vivid (0.266) |
| Temperature | cool |
| Nearest name | Medium Blue |
| Black text | 1.88:1 |
| White text | 11.16:1 |
Colors that go with Medium Blue
Matches found by rotating Medium Blue around the OKLCH hue wheel, each labelled with the closest name in our list.
Complementary
The opposite hue (180°).
Analogous
Neighbouring hues, 30° either side.
Triadic
Three hues spaced 120° apart.
Color palettes with Medium Blue
Curated color palettes that contain a color within ΔE 0.06 (OKLab) of Medium Blue, closest first.
No curated palette has a color within ΔE 0.06 of Medium Blue yet.
Similar named colors
The eight named colors closest to Medium Blue, with their ΔE distance.
- True Blue #010FCC ΔE 0.008
- Ultramarine Blue #1805DB ΔE 0.031
- Pure Blue #0203E2 ΔE 0.036
- Ultramarine #2000B1 ΔE 0.053
- Cobalt Blue #030AA7 ΔE 0.064
- Strong Blue #0C06F7 ΔE 0.072
- Primary Blue #0804F9 ΔE 0.075
- Rich Blue #021BF9 ΔE 0.080
More about Medium Blue
How to make Medium Blue
A starting recipe from common paint colors, found with a spectral paint model (the color mixer’s paint mode). Real pigments vary, so mix a small test batch and adjust.
- 2 parts blue
- 1 part purple
Recipe result: #2D45AA, a difference of ΔE 0.114 from Medium Blue. Medium Blue is more vivid than these paints can mix, so start from a ready-made blue paint and adjust it.
Codes for Medium Blue in every format
| HEX | #0000CD |
| RGB | rgb(0, 0, 205) |
| HSL | hsl(240, 100%, 40%) |
| OKLCH | oklch(38.3% 0.266 264.1) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #0000CD | 11.16:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #0000CD | 1.88:1 | Fails | Lc 11.5 | Not readable |
| #0000CD text on white | 11.16:1 | AAA | Lc 92.4 | Preferred for body text |
| #0000CD text on black | 1.88:1 | Fails | Lc -10.0 | Not readable |
Shades and tints of Medium Blue
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 900.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C7DAFF
oklch(88.6% 0.055 263.7)
-
Step 300
300
#A1C0FF
oklch(80.8% 0.096 264.1)
-
Step 400
400
#6F9DFF
oklch(70.7% 0.152 263.9)
-
Step 500
500
#4A80FF
oklch(63.1% 0.198 264.2)
-
Step 600
600
#235FFF
oklch(55.6% 0.245 264.1)
-
Step 700
700
#0038FF
oklch(49.1% 0.287 264)
-
Step 800
800
#002CD5
oklch(42.7% 0.252 264.1)
-
Step 900
900 (this color)
#0000CD
oklch(38.3% 0.266 264.1)
-
Step 950
950
#001372
oklch(27.1% 0.159 264)
Medium Blue with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #0046D2 | 0.091 |
| Deuteranopia (no green cones) | #002FCA | 0.045 |
| Tritanopia (no blue cones) | #005577 | 0.198 |
| Achromatopsia (no color) | #3B3B3B | 0.268 |
Use Medium Blue in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.