#101520
Closest named color: Rich Black (#0D1B2A). oklch(19.6% 0.024 265.4), rgb(16, 21, 32).
Aa
White text reads best on this color (18.25:1).
About this color
#101520 is a very dark close to neutral grey. In OKLCH its lightness is 20%, its chroma 0.024. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.026 away. White text reads best on it, at 18.25:1.
| Hue family | Neutrals |
| Lightness | very dark (20%) |
| Chroma | close to neutral grey (0.024) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.15:1 |
| White text | 18.25:1 |
Values
| HEX | #101520 |
| RGB | rgb(16, 21, 32) |
| HSL | hsl(221, 33%, 9%) |
| OKLCH | oklch(19.6% 0.024 265.4) |
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 #101520 | 18.25:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #101520 | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #101520 text on white | 18.25:1 | AAA | Lc 104.9 | Preferred for body text |
| #101520 text on black | 1.15:1 | 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
#D4D9E4
oklch(88.5% 0.016 266.3)
-
Step 300
300
#B8C1D3
oklch(81% 0.027 264.4)
-
Step 400
400
#93A1BD
oklch(70.8% 0.044 264.2)
-
Step 500
500
#7989AD
oklch(63.1% 0.058 266.1)
-
Step 600
600
#627398
oklch(55.6% 0.061 265.3)
-
Step 700
700
#516082
oklch(49.1% 0.058 265.9)
-
Step 800
800
#424F6A
oklch(42.8% 0.048 264.5)
-
Step 900
900
#384156
oklch(37.6% 0.038 266.6)
-
Step 950
950 (this color)
#101520
oklch(19.6% 0.024 265.4)
#101520 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) | #111620 | 0.004 |
| Deuteranopia (no green cones) | #101420 | 0.004 |
| Tritanopia (no blue cones) | #0B1719 | 0.020 |
| Achromatopsia (no color) | #151515 | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101520
#101520
oklch(19.6% 0.024 265.4)
- #1A1408
#1A1408
oklch(19.5% 0.024 84)
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 #101520, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.026
- Rich Navy #001219 ΔE 0.035
- Almost Black #070D0D ΔE 0.049
- Dark #1B2431 ΔE 0.062
- Jet #212529 ΔE 0.068
- Oxford Blue #1B263B ΔE 0.075
- Navy Blue #001146 ΔE 0.080
- Dark Navy #000435 ΔE 0.081
Use #101520 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.