#0A101A
Closest named color: Rich Navy (#001219). oklch(17.2% 0.023 260.4), rgb(10, 16, 26).
Aa
White text reads best on this color (19.05:1).
About this color
#0A101A is a very dark close to neutral grey. In OKLCH its lightness is 17%, its chroma 0.023. It has too little chroma to lean warm or cool. The nearest named color is Rich Navy (#001219), ΔE 0.020 away. White text reads best on it, at 19.05:1.
| Hue family | Neutrals |
| Lightness | very dark (17%) |
| Chroma | close to neutral grey (0.023) |
| Temperature | neutral |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.10:1 |
| White text | 19.05:1 |
Values
| HEX | #0A101A |
| RGB | rgb(10, 16, 26) |
| HSL | hsl(218, 44%, 7%) |
| OKLCH | oklch(17.2% 0.023 260.4) |
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 #0A101A | 19.05:1 | AAA | Lc -107.4 | Preferred for body text |
| Black text on #0A101A | 1.10:1 | Fails | Lc 0.0 | Not readable |
| #0A101A text on white | 19.05:1 | AAA | Lc 105.4 | Preferred for body text |
| #0A101A text on black | 1.10:1 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAEF
oklch(93.6% 0.007 260.7)
-
Step 200
200
#D3D9E3
oklch(88.4% 0.015 260.7)
-
Step 300
300
#B7C1D3
oklch(80.9% 0.028 262.3)
-
Step 400
400
#91A2BC
oklch(70.8% 0.043 258.8)
-
Step 500
500
#768AAC
oklch(63% 0.056 261)
-
Step 600
600
#5F7497
oklch(55.6% 0.06 260.5)
-
Step 700
700
#4E6181
oklch(49% 0.057 260.7)
-
Step 800
800
#404F69
oklch(42.6% 0.047 261.2)
-
Step 900
900
#364255
oklch(37.7% 0.036 259.5)
-
Step 950
950 (this color)
#0A101A
oklch(17.2% 0.023 260.4)
#0A101A 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) | #0C111A | 0.006 |
| Deuteranopia (no green cones) | #0B0F1A | 0.004 |
| Tritanopia (no blue cones) | #051213 | 0.021 |
| Achromatopsia (no color) | #101010 | 0.023 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A101A
#0A101A
oklch(17.2% 0.023 260.4)
- #150F05
#150F05
oklch(17.3% 0.023 81.6)
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 #0A101A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.020
- Almost Black #070D0D ΔE 0.029
- Rich Black #0D1B2A ΔE 0.047
- Midnight #03012D ΔE 0.072
- Dark Navy Blue #00022E ΔE 0.073
- Dark Navy #000435 ΔE 0.074
- Very Dark Brown #1D0200 ΔE 0.075
- Very Dark Blue #000133 ΔE 0.079
Use #0A101A 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.