#183F36
Closest named color: Evergreen (#05472A). oklch(33.6% 0.047 175.9), rgb(24, 63, 54).
Aa
White text reads best on this color (11.64:1).
About this color
#183F36 is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.047 and its hue 176°. Its hue sits on the cool side of the wheel. The nearest named color is Evergreen (#05472A), ΔE 0.041 away. White text reads best on it, at 11.64:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Evergreen (#05472A) |
| Black text | 1.80:1 |
| White text | 11.64:1 |
Values
| HEX | #183F36 |
| RGB | rgb(24, 63, 54) |
| HSL | hsl(166, 45%, 17%) |
| OKLCH | oklch(33.6% 0.047 175.9) |
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 #183F36 | 11.64:1 | AAA | Lc -100.3 | Preferred for body text |
| Black text on #183F36 | 1.80:1 | Fails | Lc 0.0 | Not readable |
| #183F36 text on white | 11.64:1 | AAA | Lc 96.6 | Preferred for body text |
| #183F36 text on black | 1.80:1 | 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
#CCDED8
oklch(88.5% 0.021 173.9)
-
Step 300
300
#AAC9C0
oklch(81% 0.036 175.9)
-
Step 400
400
#7BAD9F
oklch(70.8% 0.057 175.3)
-
Step 500
500
#569888
oklch(63.1% 0.072 176.4)
-
Step 600
600
#388271
oklch(55.5% 0.079 175.9)
-
Step 700
700
#2A6E5F
oklch(49% 0.073 176.1)
-
Step 800
800
#245A4E
oklch(42.7% 0.061 176.4)
-
Step 900
900 (this color)
#183F36
oklch(33.6% 0.047 175.9)
-
Step 950
950
#162B26
oklch(27% 0.029 177.1)
#183F36 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) | #3D3B36 | 0.050 |
| Deuteranopia (no green cones) | #373737 | 0.047 |
| Tritanopia (no blue cones) | #03403C | 0.014 |
| Achromatopsia (no color) | #383838 | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #183F36
#183F36
oklch(33.6% 0.047 175.9)
- #4B2D38
#4B2D38
oklch(33.8% 0.047 356.3)
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 #183F36, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Evergreen #05472A ΔE 0.041
- Onyx #343A40 ΔE 0.046
- Midnight Green #073B4C ΔE 0.046
- Pakistan Green #283618 ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.049
- Dark Teal #014D4E ΔE 0.052
- Charcoal Grey #3C4142 ΔE 0.054
- Charcoal #264653 ΔE 0.055
Use #183F36 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.