#0A2E57
Closest named color: Marine (#042E60). oklch(30.1% 0.084 254.7), rgb(10, 46, 87).
Aa
White text reads best on this color (13.62:1).
About this color
#0A2E57 is a dark, moderately saturated blue. In OKLCH its lightness is 30%, its chroma 0.084 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.016 away. White text reads best on it, at 13.62:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.54:1 |
| White text | 13.62:1 |
Values
| HEX | #0A2E57 |
| RGB | rgb(10, 46, 87) |
| HSL | hsl(212, 79%, 19%) |
| OKLCH | oklch(30.1% 0.084 254.7) |
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 #0A2E57 | 13.62:1 | AAA | Lc -103.0 | Preferred for body text |
| Black text on #0A2E57 | 1.54:1 | Fails | Lc 0.0 | Not readable |
| #0A2E57 text on white | 13.62:1 | AAA | Lc 99.8 | Preferred for body text |
| #0A2E57 text on black | 1.54:1 | Fails | Lc 0.0 | 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 950.
-
Step 50
50
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DDEBFD
oklch(93.5% 0.029 254.7)
-
Step 200
200
#C1DCFE
oklch(88.6% 0.055 254.3)
-
Step 300
300
#95C4FF
oklch(80.9% 0.098 254.5)
-
Step 400
400
#57A2FF
oklch(70.6% 0.156 255)
-
Step 500
500
#0A87FF
oklch(63.1% 0.202 254.7)
-
Step 600
600
#0071D9
oklch(55.6% 0.181 254.6)
-
Step 700
700
#005FB8
oklch(49.1% 0.16 254.6)
-
Step 800
800
#004D98
oklch(42.6% 0.139 254.8)
-
Step 900
900
#004080
oklch(37.6% 0.123 254.7)
-
Step 950
950 (this color)
#0A2E57
oklch(30.1% 0.084 254.7)
#0A2E57 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) | #193159 | 0.018 |
| Deuteranopia (no green cones) | #0A2B56 | 0.009 |
| Tritanopia (no blue cones) | #00383E | 0.064 |
| Achromatopsia (no color) | #2E2E2E | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A2E57
#0A2E57
oklch(30.1% 0.084 254.7)
- #412900
#412900
oklch(30.3% 0.064 75)
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 #0A2E57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.016
- Prussian Blue #1D3557 ΔE 0.031
- Marine Blue #01386A ΔE 0.042
- Midnight Green #073B4C ΔE 0.051
- Space Cadet #2B2D42 ΔE 0.052
- Oxford Blue #1B263B ΔE 0.053
- Dark Blue Grey #1F3B4D ΔE 0.056
- Gunmetal #293241 ΔE 0.056
Use #0A2E57 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.