#15212C
Closest named color: Dark (#1B2431). oklch(24.2% 0.027 246.8), rgb(21, 33, 44).
Aa
White text reads best on this color (16.33:1).
About this color
#15212C 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 Dark (#1B2431), ΔE 0.017 away. White text reads best on it, at 16.33:1.
| Hue family | Neutrals |
| Lightness | very dark (24%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Dark (#1B2431) |
| Black text | 1.28:1 |
| White text | 16.33:1 |
Values
| HEX | #15212C |
| RGB | rgb(21, 33, 44) |
| HSL | hsl(209, 35%, 13%) |
| OKLCH | oklch(24.2% 0.027 246.8) |
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 #15212C | 16.33:1 | AAA | Lc -105.8 | Preferred for body text |
| Black text on #15212C | 1.28:1 | Fails | Lc 0.0 | Not readable |
| #15212C text on white | 16.33:1 | AAA | Lc 103.3 | Preferred for body text |
| #15212C text on black | 1.28:1 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBF0
oklch(93.7% 0.009 242.8)
-
Step 200
200
#D0DBE5
oklch(88.6% 0.018 245.4)
-
Step 300
300
#B1C3D5
oklch(80.9% 0.032 248.2)
-
Step 400
400
#87A4BF
oklch(70.6% 0.051 246.7)
-
Step 500
500
#698EAF
oklch(63.2% 0.065 246)
-
Step 600
600
#50779B
oklch(55.5% 0.071 247.3)
-
Step 700
700
#416484
oklch(49% 0.066 247.1)
-
Step 800
800
#35526C
oklch(42.7% 0.056 246.6)
-
Step 900
900
#2F4457
oklch(37.7% 0.042 246.5)
-
Step 950
950 (this color)
#15212C
oklch(24.2% 0.027 246.8)
#15212C 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) | #1D212D | 0.013 |
| Deuteranopia (no green cones) | #1A1F2C | 0.010 |
| Tritanopia (no blue cones) | #0C2425 | 0.023 |
| Achromatopsia (no color) | #202020 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #15212C
#15212C
oklch(24.2% 0.027 246.8)
- #291D12
#291D12
oklch(24.2% 0.027 63.5)
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 #15212C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.017
- Rich Black #0D1B2A ΔE 0.026
- Jet #212529 ΔE 0.027
- Oxford Blue #1B263B ΔE 0.033
- Space Cadet #2B2D42 ΔE 0.066
- Gunmetal #293241 ΔE 0.074
- Rich Navy #001219 ΔE 0.074
- Dark Brown #341C02 ΔE 0.082
Use #15212C 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.