#21212D
Closest named color: Dark (#1B2431). oklch(25.3% 0.023 284.7), rgb(33, 33, 45).
Aa
White text reads best on this color (15.90:1).
About this color
#21212D is a dark close to neutral grey. In OKLCH its lightness is 25%, its chroma 0.023. It has too little chroma to lean warm or cool. The nearest named color is Dark (#1B2431), ΔE 0.014 away. White text reads best on it, at 15.90:1.
| Hue family | Neutrals |
| Lightness | dark (25%) |
| Chroma | close to neutral grey (0.023) |
| Temperature | neutral |
| Nearest name | Dark (#1B2431) |
| Black text | 1.32:1 |
| White text | 15.90:1 |
Values
| HEX | #21212D |
| RGB | rgb(33, 33, 45) |
| HSL | hsl(240, 15%, 15%) |
| OKLCH | oklch(25.3% 0.023 284.7) |
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 #21212D | 15.90:1 | AAA | Lc -105.4 | Preferred for body text |
| Black text on #21212D | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #21212D text on white | 15.90:1 | AAA | Lc 102.9 | Preferred for body text |
| #21212D text on black | 1.32:1 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E9E9EF
oklch(93.6% 0.008 286.2)
-
Step 200
200
#D8D8E3
oklch(88.5% 0.015 286.1)
-
Step 300
300
#BEBFD2
oklch(81% 0.027 283.4)
-
Step 400
400
#9D9DBB
oklch(70.6% 0.044 285.2)
-
Step 500
500
#8585AA
oklch(63% 0.055 284.7)
-
Step 600
600
#6F6F95
oklch(55.6% 0.059 284.3)
-
Step 700
700
#5D5D7F
oklch(49.2% 0.054 284.2)
-
Step 800
800
#4C4C67
oklch(42.8% 0.044 284.4)
-
Step 900
900
#3F3F54
oklch(37.6% 0.036 284.6)
-
Step 950
950 (this color)
#21212D
oklch(25.3% 0.023 284.7)
#21212D 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) | #1E222E | 0.006 |
| Deuteranopia (no green cones) | #1E222D | 0.006 |
| Tritanopia (no blue cones) | #1E2325 | 0.020 |
| Achromatopsia (no color) | #222222 | 0.023 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21212D
#21212D
oklch(25.3% 0.023 284.7)
- #242316
#242316
oklch(25.3% 0.023 104.2)
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 #21212D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.014
- Jet #212529 ΔE 0.018
- Oxford Blue #1B263B ΔE 0.028
- Rich Black #0D1B2A ΔE 0.041
- Space Cadet #2B2D42 ΔE 0.054
- Gunmetal #293241 ΔE 0.063
- Dark Brown #341C02 ΔE 0.073
- Eggplant #380835 ΔE 0.081
Use #21212D 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.