#39555A
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.9% 0.034 209.8), rgb(57, 85, 90).
Aa
White text reads best on this color (8.01:1).
About this color
#39555A is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.034 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.028 away. White text reads best on it, at 8.01:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.62:1 |
| White text | 8.01:1 |
Values
| HEX | #39555A |
| RGB | rgb(57, 85, 90) |
| HSL | hsl(189, 22%, 29%) |
| OKLCH | oklch(42.9% 0.034 209.8) |
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 #39555A | 8.01:1 | AAA | Lc -92.4 | Preferred for body text |
| Black text on #39555A | 2.62:1 | Fails | Lc 16.3 | Dividers and decoration only |
| #39555A text on white | 8.01:1 | AAA | Lc 87.7 | Fine for body text |
| #39555A text on black | 2.62:1 | Fails | Lc -14.4 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D1DBDD
oklch(88.4% 0.011 211)
-
Step 300
300
#B3C4C8
oklch(80.9% 0.019 213.4)
-
Step 400
400
#8AA6AC
oklch(70.6% 0.032 212.1)
-
Step 500
500
#6D9197
oklch(63.2% 0.041 208.8)
-
Step 600
600
#547B82
oklch(55.7% 0.045 209.9)
-
Step 700
700
#44676E
oklch(49% 0.042 211.5)
-
Step 800
800 (this color)
#39555A
oklch(42.9% 0.034 209.8)
-
Step 900
900
#314649
oklch(37.8% 0.027 207.1)
-
Step 950
950
#1D292B
oklch(27.1% 0.017 208.8)
#39555A 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) | #50535A | 0.032 |
| Deuteranopia (no green cones) | #4B4F5A | 0.030 |
| Tritanopia (no blue cones) | #2D5756 | 0.017 |
| Achromatopsia (no color) | #505050 | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #39555A
#39555A
oklch(42.9% 0.034 209.8)
- #614945
#614945
oklch(43% 0.034 29.3)
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 #39555A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.028
- Deep Teal #00555A ΔE 0.041
- Petrol #005F6A ΔE 0.045
- YInMn Blue #415A77 ΔE 0.050
- Dark Green Blue #1F6357 ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.056
- Dark Blue Green #005249 ΔE 0.056
- Charcoal #264653 ΔE 0.056
Use #39555A 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.