#10255C
Closest named color: Marine (#042E60). oklch(28.6% 0.102 264.8), rgb(16, 37, 92).
Aa
White text reads best on this color (14.57:1).
About this color
#10255C is a dark, moderately saturated blue. In OKLCH its lightness is 29%, its chroma 0.102 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.026 away. White text reads best on it, at 14.57:1.
| Hue family | Blues |
| Lightness | dark (29%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.44:1 |
| White text | 14.57:1 |
Values
| HEX | #10255C |
| RGB | rgb(16, 37, 92) |
| HSL | hsl(223, 70%, 21%) |
| OKLCH | oklch(28.6% 0.102 264.8) |
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 #10255C | 14.57:1 | AAA | Lc -104.0 | Preferred for body text |
| Black text on #10255C | 1.44:1 | Fails | Lc 0.0 | Not readable |
| #10255C text on white | 14.57:1 | AAA | Lc 101.0 | Preferred for body text |
| #10255C text on black | 1.44:1 | 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
#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
#A2C0FF
oklch(80.9% 0.096 264.7)
-
Step 400
400
#719DFF
oklch(70.8% 0.152 264.6)
-
Step 500
500
#4C80FF
oklch(63.2% 0.197 264.6)
-
Step 600
600
#285EFF
oklch(55.5% 0.245 264.8)
-
Step 700
700
#1645EB
oklch(49% 0.251 264.8)
-
Step 800
800
#133BBE
oklch(42.7% 0.208 264.8)
-
Step 900
900
#153695
oklch(37.7% 0.16 264.7)
-
Step 950
950 (this color)
#10255C
oklch(28.6% 0.102 264.8)
#10255C 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) | #002D5E | 0.024 |
| Deuteranopia (no green cones) | #00265B | 0.013 |
| Tritanopia (no blue cones) | #00333C | 0.082 |
| Achromatopsia (no color) | #292929 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10255C
#10255C
oklch(28.6% 0.102 264.8)
- #382700
#382700
oklch(28.5% 0.059 83.4)
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 #10255C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.026
- Midnight Blue #191970 ΔE 0.045
- Prussian Blue #1D3557 ΔE 0.055
- Marine Blue #01386A ΔE 0.058
- Oxford Blue #1B263B ΔE 0.062
- Dark Indigo #1F0954 ΔE 0.065
- Darkblue #030764 ΔE 0.068
- Space Cadet #2B2D42 ΔE 0.069
Use #10255C 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.