#183C3E
Closest named color: Midnight Green (#073B4C). oklch(33.1% 0.041 200.2), rgb(24, 60, 62).
Aa
White text reads best on this color (11.96:1).
About this color
#183C3E is a dark, muted teal or cyan. In OKLCH its lightness is 33%, its chroma 0.041 and its hue 200°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.028 away. White text reads best on it, at 11.96:1.
| Hue family | Teals and cyans |
| Lightness | dark (33%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.75:1 |
| White text | 11.96:1 |
Values
| HEX | #183C3E |
| RGB | rgb(24, 60, 62) |
| HSL | hsl(183, 44%, 17%) |
| OKLCH | oklch(33.1% 0.041 200.2) |
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 #183C3E | 11.96:1 | AAA | Lc -100.8 | Preferred for body text |
| Black text on #183C3E | 1.75:1 | Fails | Lc 0.0 | Not readable |
| #183C3E text on white | 11.96:1 | AAA | Lc 97.3 | Preferred for body text |
| #183C3E text on black | 1.75:1 | 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
#E3ECEC
oklch(93.6% 0.01 197)
-
Step 200
200
#CDDDDE
oklch(88.6% 0.017 201.4)
-
Step 300
300
#AAC7C8
oklch(80.9% 0.031 199.1)
-
Step 400
400
#7CAAAD
oklch(70.6% 0.049 201.2)
-
Step 500
500
#599599
oklch(63.1% 0.063 201.2)
-
Step 600
600
#3B8083
oklch(55.7% 0.069 199.2)
-
Step 700
700
#2D6C6F
oklch(49.2% 0.064 199.6)
-
Step 800
800
#27585B
oklch(42.8% 0.053 200.7)
-
Step 900
900 (this color)
#183C3E
oklch(33.1% 0.041 200.2)
-
Step 950
950
#162A2B
oklch(26.9% 0.026 199.8)
#183C3E 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) | #38393E | 0.043 |
| Deuteranopia (no green cones) | #31353E | 0.038 |
| Tritanopia (no blue cones) | #003E3D | 0.016 |
| Achromatopsia (no color) | #373737 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #183C3E
#183C3E
oklch(33.1% 0.041 200.2)
- #492D2D
#492D2D
oklch(33.2% 0.042 19.5)
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 #183C3E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.028
- Dark Blue Grey #1F3B4D ΔE 0.030
- Onyx #343A40 ΔE 0.037
- Gunmetal #293241 ΔE 0.040
- Charcoal #264653 ΔE 0.048
- Charcoal Grey #3C4142 ΔE 0.053
- Dark Teal #014D4E ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.057
Use #183C3E 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.