#183C33
Closest named color: Pakistan Green (#283618). oklch(32.7% 0.045 174.8), rgb(24, 60, 51).
Aa
White text reads best on this color (12.11:1).
About this color
#183C33 is a dark, muted teal or cyan. In OKLCH its lightness is 33%, its chroma 0.045 and its hue 175°. 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 12.11:1.
| Hue family | Teals and cyans |
| Lightness | dark (33%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Pakistan Green (#283618) |
| Black text | 1.73:1 |
| White text | 12.11:1 |
Values
| HEX | #183C33 |
| RGB | rgb(24, 60, 51) |
| HSL | hsl(165, 43%, 16%) |
| OKLCH | oklch(32.7% 0.045 174.8) |
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 #183C33 | 12.11:1 | AAA | Lc -101.1 | Preferred for body text |
| Black text on #183C33 | 1.73:1 | Fails | Lc 0.0 | Not readable |
| #183C33 text on white | 12.11:1 | AAA | Lc 97.6 | Preferred for body text |
| #183C33 text on black | 1.73:1 | 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 900.
-
Step 50
50
#F2F6F5
oklch(97% 0.004 179.7)
-
Step 100
100
#E4ECE9
oklch(93.6% 0.009 171.8)
-
Step 200
200
#CDDDD8
oklch(88.4% 0.018 175.3)
-
Step 300
300
#ABC8BF
oklch(80.9% 0.034 174.7)
-
Step 400
400
#7DAC9E
oklch(70.7% 0.054 174.3)
-
Step 500
500
#5A9787
oklch(63% 0.068 175.4)
-
Step 600
600
#3E8271
oklch(55.7% 0.075 174.9)
-
Step 700
700
#2F6E5E
oklch(49.2% 0.07 174.2)
-
Step 800
800
#28594D
oklch(42.6% 0.057 175.3)
-
Step 900
900 (this color)
#183C33
oklch(32.7% 0.045 174.8)
-
Step 950
950
#172B26
oklch(27% 0.028 176.4)
#183C33 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) | #3A3833 | 0.047 |
| Deuteranopia (no green cones) | #343434 | 0.045 |
| Tritanopia (no blue cones) | #073D39 | 0.014 |
| Achromatopsia (no color) | #363636 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #183C33
#183C33
oklch(32.7% 0.045 174.8)
- #472B36
#472B36
oklch(32.8% 0.045 354.7)
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 #183C33, 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 0.046
- Evergreen #05472A ΔE 0.047
- Onyx #343A40 ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.050
- Gunmetal #293241 ΔE 0.053
- Charcoal Grey #3C4142 ΔE 0.059
- Dark Teal #014D4E ΔE 0.061
Use #183C33 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.