#04252F
Closest named color: Dark (#1B2431). oklch(24.6% 0.042 222.3), rgb(4, 37, 47).
Aa
White text reads best on this color (16.02:1).
About this color
#04252F is a very dark, muted teal or cyan. In OKLCH its lightness is 25%, its chroma 0.042 and its hue 222°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.027 away. White text reads best on it, at 16.02:1.
| Hue family | Teals and cyans |
| Lightness | very dark (25%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.31:1 |
| White text | 16.02:1 |
Values
| HEX | #04252F |
| RGB | rgb(4, 37, 47) |
| HSL | hsl(194, 84%, 10%) |
| OKLCH | oklch(24.6% 0.042 222.3) |
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 #04252F | 16.02:1 | AAA | Lc -105.4 | Preferred for body text |
| Black text on #04252F | 1.31:1 | Fails | Lc 0.0 | Not readable |
| #04252F text on white | 16.02:1 | AAA | Lc 102.8 | Preferred for body text |
| #04252F text on black | 1.31:1 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E0ECF1
oklch(93.6% 0.015 224.5)
-
Step 200
200
#C7DEE6
oklch(88.6% 0.027 220.7)
-
Step 300
300
#9FC8D8
oklch(80.9% 0.049 223.7)
-
Step 400
400
#66ACC4
oklch(70.7% 0.079 222.1)
-
Step 500
500
#3297B5
oklch(63.2% 0.101 221.8)
-
Step 600
600
#00809E
oklch(55.6% 0.103 221.9)
-
Step 700
700
#006B86
oklch(49% 0.091 223.1)
-
Step 800
800
#00586E
oklch(42.7% 0.079 222.3)
-
Step 900
900
#0A495B
oklch(37.7% 0.066 222.9)
-
Step 950
950 (this color)
#04252F
oklch(24.6% 0.042 222.3)
#04252F 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) | #1F2430 | 0.033 |
| Deuteranopia (no green cones) | #19202F | 0.028 |
| Tritanopia (no blue cones) | #002828 | 0.021 |
| Achromatopsia (no color) | #212121 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04252F
#04252F
oklch(24.6% 0.042 222.3)
- #311A10
#311A10
oklch(24.6% 0.041 43.9)
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 #04252F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.027
- Rich Black #0D1B2A ΔE 0.035
- Jet #212529 ΔE 0.037
- Oxford Blue #1B263B ΔE 0.037
- Space Cadet #2B2D42 ΔE 0.070
- Gunmetal #293241 ΔE 0.074
- Rich Navy #001219 ΔE 0.078
- Navy Blue #001146 ΔE 0.084
Use #04252F 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.