#042B28
Closest named color: Jet (#212529). oklch(26.2% 0.042 187.3), rgb(4, 43, 40).
Aa
White text reads best on this color (15.20:1).
About this color
#042B28 is a dark, muted teal or cyan. In OKLCH its lightness is 26%, its chroma 0.042 and its hue 187°. Its hue sits on the cool side of the wheel. The nearest named color is Jet (#212529), ΔE 0.039 away. White text reads best on it, at 15.20:1.
| Hue family | Teals and cyans |
| Lightness | dark (26%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Jet (#212529) |
| Black text | 1.38:1 |
| White text | 15.20:1 |
Values
| HEX | #042B28 |
| RGB | rgb(4, 43, 40) |
| HSL | hsl(175, 83%, 9%) |
| OKLCH | oklch(26.2% 0.042 187.3) |
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 #042B28 | 15.20:1 | AAA | Lc -104.7 | Preferred for body text |
| Black text on #042B28 | 1.38:1 | Fails | Lc 0.0 | Not readable |
| #042B28 text on white | 15.20:1 | AAA | Lc 101.9 | Preferred for body text |
| #042B28 text on black | 1.38:1 | 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
#F1F7F6
oklch(97.1% 0.006 185.3)
-
Step 100
100
#E0EDEB
oklch(93.6% 0.014 185.9)
-
Step 200
200
#C6DFDC
oklch(88.4% 0.027 187.9)
-
Step 300
300
#9CCCC6
oklch(81% 0.051 186.7)
-
Step 400
400
#60B1A9
oklch(70.7% 0.081 187.2)
-
Step 500
500
#229D94
oklch(63.1% 0.103 187.3)
-
Step 600
600
#00857D
oklch(55.5% 0.097 187.4)
-
Step 700
700
#007069
oklch(49.1% 0.086 187.3)
-
Step 800
800
#005C56
oklch(42.8% 0.075 187.1)
-
Step 900
900
#004D48
oklch(37.8% 0.066 187.3)
-
Step 950
950 (this color)
#042B28
oklch(26.2% 0.042 187.3)
#042B28 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) | #282828 | 0.045 |
| Deuteranopia (no green cones) | #232428 | 0.043 |
| Tritanopia (no blue cones) | #002C2A | 0.005 |
| Achromatopsia (no color) | #262626 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #042B28
#042B28
oklch(26.2% 0.042 187.3)
- #361B21
#361B21
oklch(26.2% 0.043 6.2)
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 #042B28, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Jet #212529 ΔE 0.039
- Dark #1B2431 ΔE 0.042
- Oxford Blue #1B263B ΔE 0.052
- Dark Forest Green #002D04 ΔE 0.060
- Very Dark Green #062E03 ΔE 0.061
- Rich Black #0D1B2A ΔE 0.061
- Pakistan Green #283618 ΔE 0.068
- Gunmetal #293241 ΔE 0.069
Use #042B28 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.