#151B15
Closest named color: Rich Black (#0D1B2A). oklch(21.4% 0.015 145), rgb(21, 27, 21).
Aa
White text reads best on this color (17.50:1).
About this color
#151B15 is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.015. 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 17.50:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.015) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.19:1 |
| White text | 17.50:1 |
Values
| HEX | #151B15 |
| RGB | rgb(21, 27, 21) |
| HSL | hsl(120, 13%, 9%) |
| OKLCH | oklch(21.4% 0.015 145) |
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 #151B15 | 17.50:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #151B15 | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #151B15 text on white | 17.50:1 | AAA | Lc 104.3 | Preferred for body text |
| #151B15 text on black | 1.19:1 | 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
#F4F6F4
oklch(97.1% 0.003 145.5)
-
Step 100
100
#E8EBE8
oklch(93.7% 0.005 145.5)
-
Step 200
200
#D5DBD5
oklch(88.5% 0.01 145.5)
-
Step 300
300
#BAC4BA
oklch(81% 0.018 145.4)
-
Step 400
400
#96A596
oklch(70.6% 0.027 145.3)
-
Step 500
500
#7D907C
oklch(63.2% 0.037 143.8)
-
Step 600
600
#667A66
oklch(55.7% 0.039 145)
-
Step 700
700
#546654
oklch(49% 0.036 145)
-
Step 800
800
#455445
oklch(42.8% 0.031 145)
-
Step 900
900
#3A453A
oklch(37.7% 0.023 145.1)
-
Step 950
950 (this color)
#151B15
oklch(21.4% 0.015 145)
#151B15 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) | #1B1A15 | 0.011 |
| Deuteranopia (no green cones) | #1A1915 | 0.011 |
| Tritanopia (no blue cones) | #141B19 | 0.008 |
| Achromatopsia (no color) | #191919 | 0.015 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
This color is close to neutral, so it has no meaningful hue to rotate. Hue harmonies are omitted.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #151B15, 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 0.052
- Rich Navy #001219 ΔE 0.055
- Dark #1B2431 ΔE 0.057
- Almost Black #070D0D ΔE 0.062
- Dark Brown #341C02 ΔE 0.067
- Oxford Blue #1B263B ΔE 0.075
- Dark Forest Green #002D04 ΔE 0.082
Use #151B15 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.