#21242E
Closest named color: Dark (#1B2431). oklch(26.2% 0.019 271.9), rgb(33, 36, 46).
Aa
White text reads best on this color (15.48:1).
About this color
#21242E is a dark close to neutral grey. In OKLCH its lightness is 26%, its chroma 0.019. It has too little chroma to lean warm or cool. The nearest named color is Dark (#1B2431), ΔE 0.011 away. White text reads best on it, at 15.48:1.
| Hue family | Neutrals |
| Lightness | dark (26%) |
| Chroma | close to neutral grey (0.019) |
| Temperature | neutral |
| Nearest name | Dark (#1B2431) |
| Black text | 1.35:1 |
| White text | 15.48:1 |
Values
| HEX | #21242E |
| RGB | rgb(33, 36, 46) |
| HSL | hsl(226, 16%, 15%) |
| OKLCH | oklch(26.2% 0.019 271.9) |
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 #21242E | 15.48:1 | AAA | Lc -105.1 | Preferred for body text |
| Black text on #21242E | 1.35:1 | Fails | Lc 0.0 | Not readable |
| #21242E text on white | 15.48:1 | AAA | Lc 102.4 | Preferred for body text |
| #21242E text on black | 1.35:1 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E8EAEE
oklch(93.7% 0.006 264.5)
-
Step 200
200
#D6D9E2
oklch(88.6% 0.013 271.3)
-
Step 300
300
#BBC0D0
oklch(80.9% 0.023 272)
-
Step 400
400
#98A0B8
oklch(70.7% 0.036 270.9)
-
Step 500
500
#7F88A6
oklch(63% 0.046 271.9)
-
Step 600
600
#697292
oklch(55.7% 0.051 272.4)
-
Step 700
700
#575F7C
oklch(49% 0.048 272.6)
-
Step 800
800
#474E65
oklch(42.7% 0.039 271.5)
-
Step 900
900
#3C4152
oklch(37.8% 0.03 272.1)
-
Step 950
950 (this color)
#21242E
oklch(26.2% 0.019 271.9)
#21242E 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) | #21252E | 0.004 |
| Deuteranopia (no green cones) | #20242E | 0.002 |
| Tritanopia (no blue cones) | #1E2627 | 0.018 |
| Achromatopsia (no color) | #242424 | 0.019 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21242E
#21242E
oklch(26.2% 0.019 271.9)
- #28241A
#28241A
oklch(26.1% 0.019 88.8)
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 #21242E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.011
- Jet #212529 ΔE 0.011
- Oxford Blue #1B263B ΔE 0.025
- Space Cadet #2B2D42 ΔE 0.047
- Rich Black #0D1B2A ΔE 0.048
- Gunmetal #293241 ΔE 0.055
- Dark Brown #341C02 ΔE 0.072
- Prussian Blue #1D3557 ΔE 0.082
Use #21242E 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.