#0C539F
Closest named color: Dusk Blue (#26538D). oklch(44.7% 0.139 255.1), rgb(12, 83, 159).
Aa
White text reads best on this color (7.62:1).
About this color
#0C539F is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.139 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.032 away. White text reads best on it, at 7.62:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.75:1 |
| White text | 7.62:1 |
Values
| HEX | #0C539F |
| RGB | rgb(12, 83, 159) |
| HSL | hsl(211, 86%, 34%) |
| OKLCH | oklch(44.7% 0.139 255.1) |
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 #0C539F | 7.62:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #0C539F | 2.75:1 | Fails | Lc 18.1 | Dividers and decoration only |
| #0C539F text on white | 7.62:1 | AAA | Lc 85.9 | Fine for body text |
| #0C539F text on black | 2.75:1 | Fails | Lc -16.1 | Dividers and decoration only |
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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C6DBF7
oklch(88.5% 0.045 255.6)
-
Step 300
300
#9DC4F5
oklch(81% 0.081 254.4)
-
Step 400
400
#66A3F0
oklch(70.7% 0.13 255)
-
Step 500
500
#3889EB
oklch(63% 0.167 255.2)
-
Step 600
600
#0671D9
oklch(55.6% 0.18 255)
-
Step 700
700
#005EB9
oklch(49% 0.162 255.1)
-
Step 800
800 (this color)
#0C539F
oklch(44.7% 0.139 255.1)
-
Step 900
900
#104179
oklch(37.7% 0.108 254.9)
-
Step 950
950
#0C2747
oklch(27.1% 0.068 254.6)
#0C539F 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) | #275AA2 | 0.028 |
| Deuteranopia (no green cones) | #004E9E | 0.015 |
| Tritanopia (no blue cones) | #006571 | 0.103 |
| Achromatopsia (no color) | #545454 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0C539F
#0C539F
oklch(44.7% 0.139 255.1)
- #724B00
#724B00
oklch(44.6% 0.094 74.9)
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 #0C539F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.032
- Cobalt #1E488F ΔE 0.037
- Light Navy #155084 ΔE 0.044
- Deep Sea Blue #015482 ΔE 0.049
- Denim Blue #3B5B92 ΔE 0.051
- Light Navy Blue #2E5A88 ΔE 0.051
- Peacock Blue #016795 ΔE 0.063
- Blueberry #464196 ΔE 0.066
Use #0C539F 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.