#183F38
Closest named color: Midnight Green (#073B4C). oklch(33.7% 0.046 179.9), rgb(24, 63, 56).
Aa
White text reads best on this color (11.62:1).
About this color
#183F38 is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.046 and its hue 180°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.043 away. White text reads best on it, at 11.62:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.80:1 |
| White text | 11.62:1 |
Values
| HEX | #183F38 |
| RGB | rgb(24, 63, 56) |
| HSL | hsl(169, 45%, 17%) |
| OKLCH | oklch(33.7% 0.046 179.9) |
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 #183F38 | 11.62:1 | AAA | Lc -100.3 | Preferred for body text |
| Black text on #183F38 | 1.80:1 | Fails | Lc 7.3 | Not readable |
| #183F38 text on white | 11.62:1 | AAA | Lc 96.6 | Preferred for body text |
| #183F38 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
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CCDDD9
oklch(88.4% 0.019 180.2)
-
Step 300
300
#AAC8C1
oklch(80.9% 0.034 179.7)
-
Step 400
400
#7BACA2
oklch(70.7% 0.054 180.6)
-
Step 500
500
#56988B
oklch(63.2% 0.071 179.8)
-
Step 600
600
#388275
oklch(55.6% 0.077 180.1)
-
Step 700
700
#296E62
oklch(49.1% 0.072 179.8)
-
Step 800
800
#245A50
oklch(42.8% 0.06 179.3)
-
Step 900
900 (this color)
#183F38
oklch(33.7% 0.046 179.9)
-
Step 950
950
#152B27
oklch(26.9% 0.029 181)
#183F38 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) | #3C3B38 | 0.049 |
| Deuteranopia (no green cones) | #363739 | 0.046 |
| Tritanopia (no blue cones) | #02403D | 0.014 |
| Achromatopsia (no color) | #393939 | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #183F38
#183F38
oklch(33.7% 0.046 179.9)
- #4B2D36
#4B2D36
oklch(33.7% 0.046 0.4)
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 #183F38, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.043
- Evergreen #05472A ΔE 0.044
- Onyx #343A40 ΔE 0.044
- Dark Blue Grey #1F3B4D ΔE 0.045
- Pakistan Green #283618 ΔE 0.050
- Dark Teal #014D4E ΔE 0.050
- Charcoal #264653 ΔE 0.052
- Charcoal Grey #3C4142 ΔE 0.053
Use #183F38 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.