#39555D
Closest named color: Dark Slate Gray (#2F4F4F). oklch(43.1% 0.036 217.5), rgb(57, 85, 93).
Aa
White text reads best on this color (7.98:1).
About this color
#39555D is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.036 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.031 away. White text reads best on it, at 7.98:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.63:1 |
| White text | 7.98:1 |
Values
| HEX | #39555D |
| RGB | rgb(57, 85, 93) |
| HSL | hsl(193, 24%, 29%) |
| OKLCH | oklch(43.1% 0.036 217.5) |
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 #39555D | 7.98:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #39555D | 2.63:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #39555D text on white | 7.98:1 | AAA | Lc 87.6 | Fine for body text |
| #39555D text on black | 2.63:1 | Fails | Lc -14.5 | 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 800.
-
Step 50
50
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D1DBDE
oklch(88.5% 0.012 217.6)
-
Step 300
300
#B2C4CA
oklch(80.8% 0.021 219.7)
-
Step 400
400
#8AA6AE
oklch(70.7% 0.033 216.9)
-
Step 500
500
#6C909B
oklch(63% 0.043 218.6)
-
Step 600
600
#547A85
oklch(55.5% 0.046 217.8)
-
Step 700
700
#446771
oklch(49.1% 0.043 217.6)
-
Step 800
800 (this color)
#39555D
oklch(43.1% 0.036 217.5)
-
Step 900
900
#31454B
oklch(37.6% 0.027 218.3)
-
Step 950
950
#1D292C
oklch(27.1% 0.017 214.8)
#39555D 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) | #50535D | 0.032 |
| Deuteranopia (no green cones) | #4A4F5D | 0.029 |
| Tritanopia (no blue cones) | #2C5857 | 0.022 |
| Achromatopsia (no color) | #515151 | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #39555D
#39555D
oklch(43.1% 0.036 217.5)
- #624942
#624942
oklch(43% 0.036 36.2)
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 #39555D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.031
- Deep Teal #00555A ΔE 0.042
- Petrol #005F6A ΔE 0.044
- YInMn Blue #415A77 ΔE 0.045
- Dark Green Blue #1F6357 ΔE 0.053
- Dark Grey Blue #29465B ΔE 0.055
- Charcoal #264653 ΔE 0.056
- Dusty Grape #545775 ΔE 0.058
Use #39555D 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.