#151D27
Closest named color: Rich Black (#0D1B2A). oklch(22.8% 0.023 254.3), rgb(21, 29, 39).
Aa
White text reads best on this color (16.97:1).
About this color
#151D27 is a very dark close to neutral grey. In OKLCH its lightness is 23%, its chroma 0.023. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.016 away. White text reads best on it, at 16.97:1.
| Hue family | Neutrals |
| Lightness | very dark (23%) |
| Chroma | close to neutral grey (0.023) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 16.97:1 |
Values
| HEX | #151D27 |
| RGB | rgb(21, 29, 39) |
| HSL | hsl(213, 30%, 12%) |
| OKLCH | oklch(22.8% 0.023 254.3) |
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 #151D27 | 16.97:1 | AAA | Lc -106.2 | Preferred for body text |
| Black text on #151D27 | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #151D27 text on white | 16.97:1 | AAA | Lc 103.9 | Preferred for body text |
| #151D27 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D3DAE3
oklch(88.6% 0.015 254.6)
-
Step 300
300
#B5C2D2
oklch(80.9% 0.027 253.6)
-
Step 400
400
#8FA3BC
oklch(70.8% 0.043 254.1)
-
Step 500
500
#738CAB
oklch(63.2% 0.055 254)
-
Step 600
600
#5B7596
oklch(55.5% 0.06 254.7)
-
Step 700
700
#4B6280
oklch(49% 0.056 255.3)
-
Step 800
800
#3D5068
oklch(42.6% 0.047 254.6)
-
Step 900
900
#344355
oklch(37.7% 0.037 253.3)
-
Step 950
950 (this color)
#151D27
oklch(22.8% 0.023 254.3)
#151D27 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) | #191D27 | 0.007 |
| Deuteranopia (no green cones) | #171C27 | 0.005 |
| Tritanopia (no blue cones) | #0F1F20 | 0.020 |
| Achromatopsia (no color) | #1C1C1C | 0.023 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #151D27
#151D27
oklch(22.8% 0.023 254.3)
- #231B10
#231B10
oklch(22.8% 0.023 75)
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 #151D27, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.016
- Dark #1B2431 ΔE 0.031
- Jet #212529 ΔE 0.037
- Oxford Blue #1B263B ΔE 0.046
- Rich Navy #001219 ΔE 0.061
- Almost Black #070D0D ΔE 0.078
- Space Cadet #2B2D42 ΔE 0.080
- Dark Brown #341C02 ΔE 0.081
Use #151D27 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.