#183C38
Closest named color: Midnight Green (#073B4C). oklch(32.8% 0.042 185.7), rgb(24, 60, 56).
Aa
White text reads best on this color (12.05:1).
About this color
#183C38 is a dark, muted teal or cyan. In OKLCH its lightness is 33%, its chroma 0.042 and its hue 186°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.038 away. White text reads best on it, at 12.05:1.
| Hue family | Teals and cyans |
| Lightness | dark (33%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.74:1 |
| White text | 12.05:1 |
Values
| HEX | #183C38 |
| RGB | rgb(24, 60, 56) |
| HSL | hsl(173, 43%, 16%) |
| OKLCH | oklch(32.8% 0.042 185.7) |
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 #183C38 | 12.05:1 | AAA | Lc -101.0 | Preferred for body text |
| Black text on #183C38 | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #183C38 text on white | 12.05:1 | AAA | Lc 97.4 | Preferred for body text |
| #183C38 text on black | 1.74:1 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEB
oklch(93.6% 0.01 189.1)
-
Step 200
200
#CDDDDB
oklch(88.5% 0.017 187.8)
-
Step 300
300
#ABC8C3
oklch(81% 0.032 184)
-
Step 400
400
#7DABA5
oklch(70.6% 0.05 186.1)
-
Step 500
500
#5A968F
oklch(63% 0.064 186.2)
-
Step 600
600
#3D8179
oklch(55.7% 0.07 185.3)
-
Step 700
700
#2E6D66
oklch(49.2% 0.066 185.5)
-
Step 800
800
#285953
oklch(42.8% 0.054 184.9)
-
Step 900
900 (this color)
#183C38
oklch(32.8% 0.042 185.7)
-
Step 950
950
#172B28
oklch(27.1% 0.027 183.8)
#183C38 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) | #393938 | 0.045 |
| Deuteranopia (no green cones) | #333438 | 0.043 |
| Tritanopia (no blue cones) | #033D3B | 0.013 |
| Achromatopsia (no color) | #363636 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #183C38
#183C38
oklch(32.8% 0.042 185.7)
- #482C32
#482C32
oklch(33% 0.042 5.7)
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 #183C38, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.038
- Dark Blue Grey #1F3B4D ΔE 0.041
- Onyx #343A40 ΔE 0.041
- Gunmetal #293241 ΔE 0.047
- Pakistan Green #283618 ΔE 0.049
- Evergreen #05472A ΔE 0.052
- Charcoal #264653 ΔE 0.056
- Charcoal Grey #3C4142 ΔE 0.056
Use #183C38 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.