#0A1937
Closest named color: Rich Black (#0D1B2A). oklch(22% 0.062 262.5), rgb(10, 25, 55).
Aa
White text reads best on this color (17.39:1).
About this color
#0A1937 is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.062 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.028 away. White text reads best on it, at 17.39:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.20:1 |
| White text | 17.39:1 |
Values
| HEX | #0A1937 |
| RGB | rgb(10, 25, 55) |
| HSL | hsl(220, 69%, 13%) |
| OKLCH | oklch(22% 0.062 262.5) |
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 #0A1937 | 17.39:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #0A1937 | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #0A1937 text on white | 17.39:1 | AAA | Lc 104.1 | Preferred for body text |
| #0A1937 text on black | 1.20:1 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CBDAF5
oklch(88.6% 0.041 262.3)
-
Step 300
300
#A7C1F1
oklch(80.8% 0.074 262.5)
-
Step 400
400
#79A0EA
oklch(70.8% 0.117 262.5)
-
Step 500
500
#5686E4
oklch(63.1% 0.151 262.5)
-
Step 600
600
#3C6ED2
oklch(55.7% 0.164 262.4)
-
Step 700
700
#2E5BB5
oklch(49% 0.151 262.3)
-
Step 800
800
#274B93
oklch(42.7% 0.126 262.4)
-
Step 900
900
#243F75
oklch(37.7% 0.098 262.6)
-
Step 950
950 (this color)
#0A1937
oklch(22% 0.062 262.5)
#0A1937 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) | #091C38 | 0.010 |
| Deuteranopia (no green cones) | #031836 | 0.010 |
| Tritanopia (no blue cones) | #002025 | 0.050 |
| Achromatopsia (no color) | #1A1A1A | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A1937
#0A1937
oklch(22% 0.062 262.5)
- #251800
#251800
oklch(22% 0.045 81.8)
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 #0A1937, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.028
- Navy Blue #001146 ΔE 0.041
- Dark #1B2431 ΔE 0.051
- Oxford Blue #1B263B ΔE 0.053
- Night Blue #040348 ΔE 0.065
- Rich Navy #001219 ΔE 0.067
- Jet #212529 ΔE 0.068
- Dark Navy #000435 ΔE 0.069
Use #0A1937 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.