#183A33
Closest named color: Pakistan Green (#283618). oklch(32.1% 0.042 178.2), rgb(24, 58, 51).
Aa
White text reads best on this color (12.41:1).
About this color
#183A33 is a dark, muted teal or cyan. In OKLCH its lightness is 32%, its chroma 0.042 and its hue 178°. Its hue sits on the cool side of the wheel. The nearest named color is Pakistan Green (#283618), ΔE 0.041 away. White text reads best on it, at 12.41:1.
| Hue family | Teals and cyans |
| Lightness | dark (32%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Pakistan Green (#283618) |
| Black text | 1.69:1 |
| White text | 12.41:1 |
Values
| HEX | #183A33 |
| RGB | rgb(24, 58, 51) |
| HSL | hsl(168, 41%, 16%) |
| OKLCH | oklch(32.1% 0.042 178.2) |
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 #183A33 | 12.41:1 | AAA | Lc -101.6 | Preferred for body text |
| Black text on #183A33 | 1.69:1 | Fails | Lc 0.0 | Not readable |
| #183A33 text on white | 12.41:1 | AAA | Lc 98.1 | Preferred for body text |
| #183A33 text on black | 1.69:1 | 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
#F1F7F5
oklch(97.1% 0.007 174.4)
-
Step 100
100
#E0EDEA
oklch(93.6% 0.014 180.7)
-
Step 200
200
#C7DFD9
oklch(88.4% 0.027 179)
-
Step 300
300
#9FCCC1
oklch(81% 0.05 178.4)
-
Step 400
400
#66B1A1
oklch(70.7% 0.079 178.6)
-
Step 500
500
#309D8A
oklch(63% 0.101 178.7)
-
Step 600
600
#008674
oklch(55.5% 0.101 178.9)
-
Step 700
700
#007161
oklch(49.1% 0.09 178.4)
-
Step 800
800
#005D4F
oklch(42.8% 0.079 177.8)
-
Step 900
900
#084D42
oklch(37.8% 0.066 178.4)
-
Step 950
950 (this color)
#183A33
oklch(32.1% 0.042 178.2)
#183A33 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) | #383733 | 0.045 |
| Deuteranopia (no green cones) | #323334 | 0.041 |
| Tritanopia (no blue cones) | #083B38 | 0.013 |
| Achromatopsia (no color) | #343434 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #183A33
#183A33
oklch(32.1% 0.042 178.2)
- #452A33
#452A33
oklch(32.2% 0.042 358.2)
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 #183A33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Pakistan Green #283618 ΔE 0.041
- Midnight Green #073B4C ΔE 0.044
- Onyx #343A40 ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.048
- Gunmetal #293241 ΔE 0.048
- Evergreen #05472A ΔE 0.053
- Charcoal Grey #3C4142 ΔE 0.062
- Space Cadet #2B2D42 ΔE 0.064
Use #183A33 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.