#18383E
Closest named color: Midnight Green (#073B4C). oklch(31.9% 0.039 211.4), rgb(24, 56, 62).
Aa
White text reads best on this color (12.54:1).
About this color
#18383E is a dark, muted teal or cyan. In OKLCH its lightness is 32%, its chroma 0.039 and its hue 211°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.025 away. White text reads best on it, at 12.54:1.
| Hue family | Teals and cyans |
| Lightness | dark (32%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.67:1 |
| White text | 12.54:1 |
Values
| HEX | #18383E |
| RGB | rgb(24, 56, 62) |
| HSL | hsl(189, 44%, 17%) |
| OKLCH | oklch(31.9% 0.039 211.4) |
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 #18383E | 12.54:1 | AAA | Lc -101.8 | Preferred for body text |
| Black text on #18383E | 1.67:1 | Fails | Lc 0.0 | Not readable |
| #18383E text on white | 12.54:1 | AAA | Lc 98.4 | Preferred for body text |
| #18383E text on black | 1.67:1 | 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 950.
-
Step 50
50
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#E0ECEF
oklch(93.5% 0.013 214.4)
-
Step 200
200
#C7DEE3
oklch(88.5% 0.025 212.2)
-
Step 300
300
#9FC9D2
oklch(80.9% 0.046 212.2)
-
Step 400
400
#66ADBB
oklch(70.6% 0.074 211.6)
-
Step 500
500
#3399AA
oklch(63.2% 0.094 210.8)
-
Step 600
600
#008294
oklch(55.7% 0.097 211.6)
-
Step 700
700
#006D7C
oklch(49% 0.085 211.2)
-
Step 800
800
#005966
oklch(42.6% 0.074 211.8)
-
Step 900
900
#0A4A54
oklch(37.7% 0.061 211.1)
-
Step 950
950 (this color)
#18383E
oklch(31.9% 0.039 211.4)
#18383E 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) | #33363E | 0.036 |
| Deuteranopia (no green cones) | #2D323E | 0.032 |
| Tritanopia (no blue cones) | #003B3A | 0.022 |
| Achromatopsia (no color) | #333333 | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18383E
#18383E
oklch(31.9% 0.039 211.4)
- #442B26
#442B26
oklch(31.8% 0.039 31.8)
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 #18383E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.025
- Dark Blue Grey #1F3B4D ΔE 0.029
- Gunmetal #293241 ΔE 0.030
- Onyx #343A40 ΔE 0.039
- Space Cadet #2B2D42 ΔE 0.046
- Prussian Blue #1D3557 ΔE 0.050
- Charcoal #264653 ΔE 0.057
- Charcoal Grey #3C4142 ΔE 0.061
Use #18383E 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.