#151E18
Closest named color: Rich Black (#0D1B2A). oklch(22.4% 0.017 155.6), rgb(21, 30, 24).
Aa
White text reads best on this color (17.06:1).
About this color
#151E18 is a very dark close to neutral grey. In OKLCH its lightness is 22%, its chroma 0.017. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.042 away. White text reads best on it, at 17.06:1.
| Hue family | Neutrals |
| Lightness | very dark (22%) |
| Chroma | close to neutral grey (0.017) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 17.06:1 |
Values
| HEX | #151E18 |
| RGB | rgb(21, 30, 24) |
| HSL | hsl(140, 18%, 10%) |
| OKLCH | oklch(22.4% 0.017 155.6) |
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 #151E18 | 17.06:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #151E18 | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #151E18 text on white | 17.06:1 | AAA | Lc 104.0 | Preferred for body text |
| #151E18 text on black | 1.23:1 | 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E7EBE8
oklch(93.6% 0.006 153.8)
-
Step 200
200
#D3DBD6
oklch(88.4% 0.011 158.8)
-
Step 300
300
#B7C5BB
oklch(81% 0.021 154.8)
-
Step 400
400
#91A798
oklch(70.7% 0.033 155.7)
-
Step 500
500
#75917F
oklch(63% 0.042 156.8)
-
Step 600
600
#5E7C68
oklch(55.7% 0.046 155.4)
-
Step 700
700
#4D6856
oklch(49% 0.043 155.3)
-
Step 800
800
#3F5547
oklch(42.7% 0.036 156.6)
-
Step 900
900
#36463B
oklch(37.7% 0.028 154.9)
-
Step 950
950 (this color)
#151E18
oklch(22.4% 0.017 155.6)
#151E18 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) | #1E1D18 | 0.016 |
| Deuteranopia (no green cones) | #1C1B18 | 0.016 |
| Tritanopia (no blue cones) | #141E1C | 0.008 |
| Achromatopsia (no color) | #1C1C1C | 0.018 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #151E18
#151E18
oklch(22.4% 0.017 155.6)
- #21181F
#21181F
oklch(22.3% 0.019 334.1)
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 #151E18, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.042
- Jet #212529 ΔE 0.043
- Dark #1B2431 ΔE 0.049
- Rich Navy #001219 ΔE 0.062
- Dark Brown #341C02 ΔE 0.064
- Oxford Blue #1B263B ΔE 0.068
- Almost Black #070D0D ΔE 0.072
- Dark Forest Green #002D04 ΔE 0.074
Use #151E18 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.