#04242B
Closest named color: Dark (#1B2431). oklch(24.1% 0.039 215.3), rgb(4, 36, 43).
Aa
White text reads best on this color (16.24:1).
About this color
#04242B is a very dark, muted teal or cyan. In OKLCH its lightness is 24%, its chroma 0.039 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.031 away. White text reads best on it, at 16.24:1.
| Hue family | Teals and cyans |
| Lightness | very dark (24%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.29:1 |
| White text | 16.24:1 |
Values
| HEX | #04242B |
| RGB | rgb(4, 36, 43) |
| HSL | hsl(191, 83%, 9%) |
| OKLCH | oklch(24.1% 0.039 215.3) |
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 #04242B | 16.24:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #04242B | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #04242B text on white | 16.24:1 | AAA | Lc 103.0 | Preferred for body text |
| #04242B text on black | 1.29:1 | 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
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C7DEE4
oklch(88.5% 0.026 215.2)
-
Step 300
300
#A0C9D3
oklch(81% 0.046 214.2)
-
Step 400
400
#68ADBD
oklch(70.8% 0.073 214.2)
-
Step 500
500
#3798AD
oklch(63.2% 0.093 214.9)
-
Step 600
600
#008197
oklch(55.5% 0.098 215.2)
-
Step 700
700
#006D80
oklch(49.2% 0.087 215.3)
-
Step 800
800
#005969
oklch(42.7% 0.076 215.4)
-
Step 900
900
#0D4A56
oklch(37.8% 0.061 214.6)
-
Step 950
950 (this color)
#04242B
oklch(24.1% 0.039 215.3)
#04242B 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) | #1F232B | 0.034 |
| Deuteranopia (no green cones) | #1A1F2B | 0.030 |
| Tritanopia (no blue cones) | #002726 | 0.017 |
| Achromatopsia (no color) | #202020 | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04242B
#04242B
oklch(24.1% 0.039 215.3)
- #2F1913
#2F1913
oklch(24.2% 0.037 36)
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 #04242B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.031
- Rich Black #0D1B2A ΔE 0.033
- Jet #212529 ΔE 0.038
- Oxford Blue #1B263B ΔE 0.043
- Rich Navy #001219 ΔE 0.073
- Space Cadet #2B2D42 ΔE 0.076
- Gunmetal #293241 ΔE 0.079
- Dark Forest Green #002D04 ΔE 0.081
Use #04242B 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.