#04282B
Closest named color: Dark (#1B2431). oklch(25.4% 0.04 203.1), rgb(4, 40, 43).
Aa
White text reads best on this color (15.63:1).
About this color
#04282B is a dark, muted teal or cyan. In OKLCH its lightness is 25%, its chroma 0.040 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.033 away. White text reads best on it, at 15.63:1.
| Hue family | Teals and cyans |
| Lightness | dark (25%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.34:1 |
| White text | 15.63:1 |
Values
| HEX | #04282B |
| RGB | rgb(4, 40, 43) |
| HSL | hsl(185, 83%, 9%) |
| OKLCH | oklch(25.4% 0.04 203.1) |
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 #04282B | 15.63:1 | AAA | Lc -105.1 | Preferred for body text |
| Black text on #04282B | 1.34:1 | Fails | Lc 0.0 | Not readable |
| #04282B text on white | 15.63:1 | AAA | Lc 102.4 | Preferred for body text |
| #04282B text on black | 1.34:1 | 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
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E0EDEE
oklch(93.7% 0.014 202.5)
-
Step 200
200
#C6DFE1
oklch(88.6% 0.027 202.5)
-
Step 300
300
#9ECACE
oklch(80.9% 0.047 203.2)
-
Step 400
400
#64AFB5
oklch(70.8% 0.075 202.3)
-
Step 500
500
#2B9AA3
oklch(63% 0.096 203.1)
-
Step 600
600
#00838C
oklch(55.6% 0.095 203.3)
-
Step 700
700
#006E76
oklch(49.1% 0.084 203.6)
-
Step 800
800
#005A61
oklch(42.6% 0.073 204)
-
Step 900
900
#044B50
oklch(37.7% 0.063 202.7)
-
Step 950
950 (this color)
#04282B
oklch(25.4% 0.04 203.1)
#04282B 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) | #24262B | 0.040 |
| Deuteranopia (no green cones) | #1E222B | 0.036 |
| Tritanopia (no blue cones) | #002A29 | 0.010 |
| Achromatopsia (no color) | #232323 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04282B
#04282B
oklch(25.4% 0.04 203.1)
- #331B19
#331B19
oklch(25.4% 0.039 25.2)
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 #04282B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.033
- Jet #212529 ΔE 0.035
- Oxford Blue #1B263B ΔE 0.044
- Rich Black #0D1B2A ΔE 0.048
- Space Cadet #2B2D42 ΔE 0.070
- Gunmetal #293241 ΔE 0.071
- Dark Forest Green #002D04 ΔE 0.071
- Very Dark Green #062E03 ΔE 0.073
Use #04282B 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.