#183E33
Closest named color: Evergreen (#05472A). oklch(33.2% 0.048 171.8), rgb(24, 62, 51).
Aa
White text reads best on this color (11.82:1).
About this color
#183E33 is a dark, muted teal or cyan. In OKLCH its lightness is 33%, its chroma 0.048 and its hue 172°. Its hue sits on the cool side of the wheel. The nearest named color is Evergreen (#05472A), ΔE 0.040 away. White text reads best on it, at 11.82:1.
| Hue family | Teals and cyans |
| Lightness | dark (33%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Evergreen (#05472A) |
| Black text | 1.77:1 |
| White text | 11.82:1 |
Values
| HEX | #183E33 |
| RGB | rgb(24, 62, 51) |
| HSL | hsl(163, 44%, 17%) |
| OKLCH | oklch(33.2% 0.048 171.8) |
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 #183E33 | 11.82:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #183E33 | 1.77:1 | Fails | Lc 0.0 | Not readable |
| #183E33 text on white | 11.82:1 | AAA | Lc 97.0 | Preferred for body text |
| #183E33 text on black | 1.77:1 | 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
#E3ECE9
oklch(93.5% 0.01 174.3)
-
Step 200
200
#CDDED7
oklch(88.6% 0.021 169.3)
-
Step 300
300
#AAC9BE
oklch(81% 0.037 171.9)
-
Step 400
400
#7CAD9C
oklch(70.8% 0.058 171.1)
-
Step 500
500
#589884
oklch(63.1% 0.073 171.8)
-
Step 600
600
#3B836E
oklch(55.8% 0.08 171.6)
-
Step 700
700
#2C6E5C
oklch(49% 0.073 172.5)
-
Step 800
800
#265A4B
oklch(42.7% 0.062 171.8)
-
Step 900
900 (this color)
#183E33
oklch(33.2% 0.048 171.8)
-
Step 950
950
#162B25
oklch(26.9% 0.03 173.8)
#183E33 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) | #3C3A32 | 0.049 |
| Deuteranopia (no green cones) | #363634 | 0.047 |
| Tritanopia (no blue cones) | #063F3B | 0.016 |
| Achromatopsia (no color) | #373737 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #183E33
#183E33
oklch(33.2% 0.048 171.8)
- #492B39
#492B39
oklch(33.2% 0.049 350.6)
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 #183E33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Evergreen #05472A ΔE 0.040
- Pakistan Green #283618 ΔE 0.042
- Onyx #343A40 ΔE 0.048
- Midnight Green #073B4C ΔE 0.050
- Dark Blue Grey #1F3B4D ΔE 0.052
- Pine Green #0A481E ΔE 0.056
- Dark Teal #014D4E ΔE 0.057
- Charcoal Grey #3C4142 ΔE 0.058
Use #183E33 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.