#008ACD
Closest named color: Water Blue (#0E87CC). oklch(60.5% 0.141 240.8), rgb(0, 138, 205).
Aa
Black text reads best on this color (5.51:1).
About this color
#008ACD is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.141 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.008 away. Black text reads best on it, at 5.51:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.51:1 |
| White text | 3.80:1 |
Values
| HEX | #008ACD |
| RGB | rgb(0, 138, 205) |
| HSL | hsl(200, 100%, 40%) |
| OKLCH | oklch(60.5% 0.141 240.8) |
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 #008ACD | 3.80:1 | AA large text | Lc -70.4 | Content text, not long reading |
| Black text on #008ACD | 5.51:1 | AA | Lc 39.2 | Non-text elements, placeholder text |
| #008ACD text on white | 3.80:1 | AA large text | Lc 64.9 | Content text, not long reading |
| #008ACD text on black | 5.51:1 | AA | Lc -36.8 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF6
oklch(93.6% 0.019 240.7)
-
Step 200
200
#C4DDF0
oklch(88.5% 0.037 240.7)
-
Step 300
300
#99C7E9
oklch(80.9% 0.068 240.7)
-
Step 400
400
#5BA9DF
oklch(70.7% 0.111 241)
-
Step 500
500 (this color)
#008ACD
oklch(60.5% 0.141 240.8)
-
Step 600
600
#007BB7
oklch(55.7% 0.129 240.7)
-
Step 700
700
#00679B
oklch(49.1% 0.115 241)
-
Step 800
800
#005480
oklch(42.6% 0.1 241.3)
-
Step 900
900
#00466B
oklch(37.7% 0.087 240.8)
-
Step 950
950
#042940
oklch(26.9% 0.059 241.5)
#008ACD 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) | #698CD0 | 0.068 |
| Deuteranopia (no green cones) | #507CCC | 0.051 |
| Tritanopia (no blue cones) | #009BA2 | 0.094 |
| Achromatopsia (no color) | #838383 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #008ACD
#008ACD
oklch(60.5% 0.141 240.8)
- #BC6A01
#BC6A01
oklch(60.4% 0.14 60.9)
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 #008ACD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.008
- Blue NCS #118AB2 ΔE 0.042
- Cool Blue #4984B8 ΔE 0.043
- Steel Blue #4682B4 ΔE 0.046
- Dark Sky Blue #448EE4 ΔE 0.049
- Windows Blue #3778BF ΔE 0.050
- Nice Blue #107AB0 ΔE 0.057
- Off Blue #5684AE ΔE 0.060
Use #008ACD 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.