#181520
Closest named color: Rich Black (#0D1B2A). oklch(20.5% 0.022 296.9), rgb(24, 21, 32).
Aa
White text reads best on this color (17.99:1).
About this color
#181520 is a very dark close to neutral grey. In OKLCH its lightness is 20%, its chroma 0.022. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.029 away. White text reads best on it, at 17.99:1.
| Hue family | Neutrals |
| Lightness | very dark (20%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 17.99:1 |
Values
| HEX | #181520 |
| RGB | rgb(24, 21, 32) |
| HSL | hsl(256, 21%, 10%) |
| OKLCH | oklch(20.5% 0.022 296.9) |
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 #181520 | 17.99:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #181520 | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #181520 text on white | 17.99:1 | AAA | Lc 104.7 | Preferred for body text |
| #181520 text on black | 1.16:1 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#EAE9EE
oklch(93.6% 0.007 295.4)
-
Step 200
200
#DAD7E2
oklch(88.5% 0.015 298.5)
-
Step 300
300
#C2BDD0
oklch(80.8% 0.027 297.8)
-
Step 400
400
#A39CB8
oklch(70.8% 0.041 296.8)
-
Step 500
500
#8C83A6
oklch(63% 0.053 296.6)
-
Step 600
600
#776C92
oklch(55.6% 0.059 297.7)
-
Step 700
700
#645A7C
oklch(49% 0.055 297.8)
-
Step 800
800
#514A65
oklch(42.7% 0.045 296.3)
-
Step 900
900
#433E52
oklch(37.7% 0.034 296.2)
-
Step 950
950 (this color)
#181520
oklch(20.5% 0.022 296.9)
#181520 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) | #131720 | 0.011 |
| Deuteranopia (no green cones) | #131620 | 0.010 |
| Tritanopia (no blue cones) | #171719 | 0.018 |
| Achromatopsia (no color) | #171717 | 0.022 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #181520
#181520
oklch(20.5% 0.022 296.9)
- #16180D
#16180D
oklch(20.3% 0.021 116.7)
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 #181520, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.029
- Rich Navy #001219 ΔE 0.049
- Dark #1B2431 ΔE 0.056
- Almost Black #070D0D ΔE 0.058
- Jet #212529 ΔE 0.060
- Oxford Blue #1B263B ΔE 0.070
- Very Dark Purple #2A0134 ΔE 0.079
- Midnight Purple #280137 ΔE 0.080
Use #181520 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.