#15212A
Closest named color: Dark (#1B2431). oklch(24.1% 0.024 241.4), rgb(21, 33, 42).
Aa
White text reads best on this color (16.36:1).
About this color
#15212A is a very dark close to neutral grey. In OKLCH its lightness is 24%, its chroma 0.024. It has too little chroma to lean warm or cool. The nearest named color is Dark (#1B2431), ΔE 0.019 away. White text reads best on it, at 16.36:1.
| Hue family | Neutrals |
| Lightness | very dark (24%) |
| Chroma | close to neutral grey (0.024) |
| Temperature | neutral |
| Nearest name | Dark (#1B2431) |
| Black text | 1.28:1 |
| White text | 16.36:1 |
Values
| HEX | #15212A |
| RGB | rgb(21, 33, 42) |
| HSL | hsl(206, 33%, 12%) |
| OKLCH | oklch(24.1% 0.024 241.4) |
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 #15212A | 16.36:1 | AAA | Lc -105.8 | Preferred for body text |
| Black text on #15212A | 1.28:1 | Fails | Lc 0.0 | Not readable |
| #15212A text on white | 16.36:1 | AAA | Lc 103.3 | Preferred for body text |
| #15212A 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
#E5EBEF
oklch(93.7% 0.008 236.6)
-
Step 200
200
#D0DBE3
oklch(88.5% 0.016 239.1)
-
Step 300
300
#B1C3D2
oklch(80.8% 0.029 243.2)
-
Step 400
400
#88A5BB
oklch(70.8% 0.046 241)
-
Step 500
500
#6A8EAA
oklch(63% 0.058 242.2)
-
Step 600
600
#517895
oklch(55.5% 0.063 241.5)
-
Step 700
700
#41657F
oklch(49% 0.059 240.9)
-
Step 800
800
#365368
oklch(42.8% 0.049 240.8)
-
Step 900
900
#2F4454
oklch(37.6% 0.038 241.8)
-
Step 950
950 (this color)
#15212A
oklch(24.1% 0.024 241.4)
#15212A 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) | #1D212A | 0.013 |
| Deuteranopia (no green cones) | #1A1F2A | 0.010 |
| Tritanopia (no blue cones) | #0D2324 | 0.019 |
| Achromatopsia (no color) | #202020 | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #15212A
#15212A
oklch(24.1% 0.024 241.4)
- #281D14
#281D14
oklch(24.1% 0.024 60.6)
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 #15212A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.019
- Jet #212529 ΔE 0.026
- Rich Black #0D1B2A ΔE 0.026
- Oxford Blue #1B263B ΔE 0.036
- Space Cadet #2B2D42 ΔE 0.068
- Rich Navy #001219 ΔE 0.073
- Gunmetal #293241 ΔE 0.075
- Dark Brown #341C02 ΔE 0.079
Use #15212A 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.