#152121
Closest named color: Jet (#212529). oklch(23.7% 0.017 196.1), rgb(21, 33, 33).
Aa
White text reads best on this color (16.51:1).
About this color
#152121 is a very dark close to neutral grey. In OKLCH its lightness is 24%, its chroma 0.017. It has too little chroma to lean warm or cool. The nearest named color is Jet (#212529), ΔE 0.029 away. White text reads best on it, at 16.51:1.
| Hue family | Neutrals |
| Lightness | very dark (24%) |
| Chroma | close to neutral grey (0.017) |
| Temperature | neutral |
| Nearest name | Jet (#212529) |
| Black text | 1.27:1 |
| White text | 16.51:1 |
Values
| HEX | #152121 |
| RGB | rgb(21, 33, 33) |
| HSL | hsl(180, 22%, 11%) |
| OKLCH | oklch(23.7% 0.017 196.1) |
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 #152121 | 16.51:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #152121 | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #152121 text on white | 16.51:1 | AAA | Lc 103.4 | Preferred for body text |
| #152121 text on black | 1.27:1 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D1DBDB
oklch(88.4% 0.011 197)
-
Step 300
300
#B3C5C5
oklch(81% 0.02 196.8)
-
Step 400
400
#8AA7A7
oklch(70.7% 0.032 196.4)
-
Step 500
500
#6D9291
oklch(63.2% 0.041 194.1)
-
Step 600
600
#547C7C
oklch(55.7% 0.045 195.9)
-
Step 700
700
#446868
oklch(49% 0.041 195.9)
-
Step 800
800
#385555
oklch(42.7% 0.035 195.9)
-
Step 900
900
#314646
oklch(37.7% 0.026 196.1)
-
Step 950
950 (this color)
#152121
oklch(23.7% 0.017 196.1)
#152121 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) | #1F2021 | 0.017 |
| Deuteranopia (no green cones) | #1D1E21 | 0.016 |
| Tritanopia (no blue cones) | #112221 | 0.006 |
| Achromatopsia (no color) | #1F1F1F | 0.017 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #152121
#152121
oklch(23.7% 0.017 196.1)
- #261B1C
#261B1C
oklch(23.6% 0.018 12.4)
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 #152121, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Jet #212529 ΔE 0.029
- Dark #1B2431 ΔE 0.033
- Rich Black #0D1B2A ΔE 0.035
- Oxford Blue #1B263B ΔE 0.051
- Dark Brown #341C02 ΔE 0.069
- Rich Navy #001219 ΔE 0.070
- Dark Forest Green #002D04 ΔE 0.077
- Very Dark Green #062E03 ΔE 0.079
Use #152121 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.