#0D31CD
Closest named color: Blue Blue (#2242C7). oklch(42.6% 0.237 265), rgb(13, 49, 205).
Aa
White text reads best on this color (8.98:1).
About this color
#0D31CD is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.237 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.039 away. White text reads best on it, at 8.98:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.237) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.33:1 |
| White text | 8.98:1 |
Values
| HEX | #0D31CD |
| RGB | rgb(13, 49, 205) |
| HSL | hsl(229, 88%, 43%) |
| OKLCH | oklch(42.6% 0.237 265) |
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 #0D31CD | 8.98:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #0D31CD | 2.33:1 | Fails | Lc 14.9 | Not readable |
| #0D31CD text on white | 8.98:1 | AAA | Lc 89.1 | Fine for body text |
| #0D31CD text on black | 2.33:1 | Fails | Lc -13.1 | Not readable |
Tints and shades
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 800.
-
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
#C7D9FF
oklch(88.4% 0.056 265.2)
-
Step 300
300
#A3C0FF
oklch(80.9% 0.095 265.2)
-
Step 400
400
#719CFF
oklch(70.6% 0.153 265)
-
Step 500
500
#4D80FF
oklch(63.2% 0.197 264.8)
-
Step 600
600
#2A5EFF
oklch(55.6% 0.245 265.1)
-
Step 700
700
#1037FF
oklch(49.1% 0.286 265)
-
Step 800
800 (this color)
#0D31CD
oklch(42.6% 0.237 265)
-
Step 900
900
#0F30A1
oklch(37.7% 0.185 265)
-
Step 950
950
#091E5E
oklch(26.9% 0.117 265)
#0D31CD 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) | #0052D1 | 0.067 |
| Deuteranopia (no green cones) | #0040CA | 0.027 |
| Tritanopia (no blue cones) | #00617D | 0.180 |
| Achromatopsia (no color) | #494949 | 0.238 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0D31CD
#0D31CD
oklch(42.6% 0.237 265)
- #654A00
#654A00
oklch(42.7% 0.087 84.5)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #0D31CD, closest first.
No curated palette has a color within ΔE 0.04 of #0D31CD.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.039
- Ultramarine Blue #1805DB ΔE 0.042
- True Blue #010FCC ΔE 0.044
- Pure Blue #0203E2 ΔE 0.050
- Medium Blue #0000CD ΔE 0.052
- Majorelle Blue #3F37C9 ΔE 0.054
- Sapphire #2138AB ΔE 0.057
- Strong Blue #0C06F7 ΔE 0.069
Use #0D31CD 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.