#102421
Closest named color: Jet (#212529). oklch(24.2% 0.027 183.3), rgb(16, 36, 33).
Aa
White text reads best on this color (16.19:1).
About this color
#102421 is a very dark close to neutral grey. In OKLCH its lightness is 24%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Jet (#212529), ΔE 0.031 away. White text reads best on it, at 16.19:1.
| Hue family | Neutrals |
| Lightness | very dark (24%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Jet (#212529) |
| Black text | 1.29:1 |
| White text | 16.19:1 |
Values
| HEX | #102421 |
| RGB | rgb(16, 36, 33) |
| HSL | hsl(171, 38%, 10%) |
| OKLCH | oklch(24.2% 0.027 183.3) |
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 #102421 | 16.19:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #102421 | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #102421 text on white | 16.19:1 | AAA | Lc 103.1 | Preferred for body text |
| #102421 text on black | 1.29:1 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E4ECEA
oklch(93.6% 0.009 179.6)
-
Step 200
200
#CDDDDA
oklch(88.5% 0.018 183.5)
-
Step 300
300
#ABC8C2
oklch(81% 0.032 181.6)
-
Step 400
400
#7DABA4
oklch(70.6% 0.05 184.5)
-
Step 500
500
#5A978D
oklch(63.2% 0.066 182.5)
-
Step 600
600
#3D8177
oklch(55.6% 0.071 182.8)
-
Step 700
700
#2F6D64
oklch(49.1% 0.066 182.7)
-
Step 800
800
#285952
oklch(42.8% 0.055 183.2)
-
Step 900
900
#264944
oklch(37.7% 0.042 183.9)
-
Step 950
950 (this color)
#102421
oklch(24.2% 0.027 183.3)
#102421 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) | #222221 | 0.028 |
| Deuteranopia (no green cones) | #1F1F21 | 0.028 |
| Tritanopia (no blue cones) | #082523 | 0.008 |
| Achromatopsia (no color) | #202020 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #102421
#102421
oklch(24.2% 0.027 183.3)
- #2B1A1E
#2B1A1E
oklch(24.1% 0.028 3.9)
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 #102421, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Jet #212529 ΔE 0.031
- Dark #1B2431 ΔE 0.036
- Rich Black #0D1B2A ΔE 0.043
- Oxford Blue #1B263B ΔE 0.053
- Dark Forest Green #002D04 ΔE 0.066
- Very Dark Green #062E03 ΔE 0.068
- Dark Brown #341C02 ΔE 0.072
- Rich Navy #001219 ΔE 0.076
Use #102421 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.