#15242C
Closest named color: Dark (#1B2431). oklch(25.1% 0.025 232.4), rgb(21, 36, 44).
Aa
White text reads best on this color (15.90:1).
About this color
#15242C is a dark close to neutral grey. In OKLCH its lightness is 25%, its chroma 0.025. 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 (0.025) |
| Temperature | neutral |
| Nearest name | Dark (#1B2431) |
| Black text | 1.32:1 |
| White text | 15.90:1 |
Values
| HEX | #15242C |
| RGB | rgb(21, 36, 44) |
| HSL | hsl(201, 35%, 13%) |
| OKLCH | oklch(25.1% 0.025 232.4) |
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 #15242C | 15.90:1 | AAA | Lc -105.4 | Preferred for body text |
| Black text on #15242C | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #15242C text on white | 15.90:1 | AAA | Lc 102.8 | Preferred for body text |
| #15242C 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CFDBE2
oklch(88.4% 0.016 233)
-
Step 300
300
#AEC4D1
oklch(80.8% 0.03 233.7)
-
Step 400
400
#83A6BA
oklch(70.6% 0.048 233.4)
-
Step 500
500
#6390A9
oklch(63% 0.062 233.4)
-
Step 600
600
#497A94
oklch(55.5% 0.067 232.9)
-
Step 700
700
#3A677E
oklch(49.1% 0.062 232.2)
-
Step 800
800
#305467
oklch(42.7% 0.052 232.9)
-
Step 900
900
#2B4553
oklch(37.6% 0.04 232.8)
-
Step 950
950 (this color)
#15242C
oklch(25.1% 0.025 232.4)
#15242C 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) | #20242C | 0.017 |
| Deuteranopia (no green cones) | #1D212C | 0.015 |
| Tritanopia (no blue cones) | #0C2627 | 0.018 |
| Achromatopsia (no color) | #222222 | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #15242C
#15242C
oklch(25.1% 0.025 232.4)
- #2C1E16
#2C1E16
oklch(25% 0.026 50.9)
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 #15242C, 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 0.020
- Oxford Blue #1B263B ΔE 0.030
- Rich Black #0D1B2A ΔE 0.036
- Space Cadet #2B2D42 ΔE 0.061
- Gunmetal #293241 ΔE 0.066
- Dark Brown #341C02 ΔE 0.079
- Rich Navy #001219 ΔE 0.082
Use #15242C 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.