#10101D
Closest named color: Rich Navy (#001219). oklch(18% 0.027 283.4), rgb(16, 16, 29).
Aa
White text reads best on this color (18.85:1).
About this color
#10101D is a very dark close to neutral grey. In OKLCH its lightness is 18%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Rich Navy (#001219), ΔE 0.032 away. White text reads best on it, at 18.85:1.
| Hue family | Neutrals |
| Lightness | very dark (18%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.11:1 |
| White text | 18.85:1 |
Values
| HEX | #10101D |
| RGB | rgb(16, 16, 29) |
| HSL | hsl(240, 29%, 9%) |
| OKLCH | oklch(18% 0.027 283.4) |
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 #10101D | 18.85:1 | AAA | Lc -107.3 | Preferred for body text |
| Black text on #10101D | 1.11:1 | Fails | Lc 0.0 | Not readable |
| #10101D text on white | 18.85:1 | AAA | Lc 105.3 | Preferred for body text |
| #10101D text on black | 1.11:1 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E9E9F0
oklch(93.6% 0.009 286.2)
-
Step 200
200
#D7D8E5
oklch(88.5% 0.018 282.5)
-
Step 300
300
#BDBED5
oklch(80.8% 0.032 283.7)
-
Step 400
400
#9C9DC0
oklch(70.7% 0.051 283.7)
-
Step 500
500
#8485B0
oklch(63.2% 0.064 283.4)
-
Step 600
600
#6E6E9B
oklch(55.6% 0.069 283.9)
-
Step 700
700
#5C5C85
oklch(49.2% 0.065 283.7)
-
Step 800
800
#4B4B6C
oklch(42.7% 0.054 283.9)
-
Step 900
900
#3E3F57
oklch(37.7% 0.041 282.4)
-
Step 950
950 (this color)
#10101D
oklch(18% 0.027 283.4)
#10101D 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) | #0C121E | 0.009 |
| Deuteranopia (no green cones) | #0C111D | 0.008 |
| Tritanopia (no blue cones) | #0D1215 | 0.021 |
| Achromatopsia (no color) | #111111 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10101D
#10101D
oklch(18% 0.027 283.4)
- #141205
#141205
oklch(18% 0.025 101.3)
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 #10101D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.032
- Almost Black #070D0D ΔE 0.039
- Rich Black #0D1B2A ΔE 0.042
- Midnight #03012D ΔE 0.073
- Dark Navy #000435 ΔE 0.074
- Very Dark Brown #1D0200 ΔE 0.074
- Dark Navy Blue #00022E ΔE 0.075
- Dark #1B2431 ΔE 0.079
Use #10101D 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.