#375457
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.4% 0.035 204.1), rgb(55, 84, 87).
Aa
White text reads best on this color (8.17:1).
About this color
#375457 is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.035 and its hue 204°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.022 away. White text reads best on it, at 8.17:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.56:1 |
| White text | 8.17:1 |
Values
| HEX | #375457 |
| RGB | rgb(55, 84, 87) |
| HSL | hsl(186, 23%, 28%) |
| OKLCH | oklch(42.4% 0.035 204.1) |
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 #375457 | 8.17:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #375457 | 2.56:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #375457 text on white | 8.17:1 | AAA | Lc 88.2 | Fine for body text |
| #375457 text on black | 2.56:1 | Fails | Lc -13.9 | 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
#D1DBDC
oklch(88.4% 0.011 204.1)
-
Step 300
300
#B2C5C7
oklch(81% 0.021 204.4)
-
Step 400
400
#8AA7AA
oklch(70.7% 0.032 204.2)
-
Step 500
500
#6C9195
oklch(63.1% 0.041 204.5)
-
Step 600
600
#537B80
oklch(55.5% 0.045 205.8)
-
Step 700
700
#43686C
oklch(49.1% 0.043 204.5)
-
Step 800
800 (this color)
#375457
oklch(42.4% 0.035 204.1)
-
Step 900
900
#304648
oklch(37.7% 0.028 203.1)
-
Step 950
950
#1D292A
oklch(27% 0.017 202.6)
#375457 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) | #505257 | 0.035 |
| Deuteranopia (no green cones) | #4A4D57 | 0.033 |
| Tritanopia (no blue cones) | #2B5655 | 0.015 |
| Achromatopsia (no color) | #4F4F4F | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375457
#375457
oklch(42.4% 0.035 204.1)
- #604745
#604745
oklch(42.4% 0.035 23.9)
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 #375457, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.022
- Deep Teal #00555A ΔE 0.038
- Petrol #005F6A ΔE 0.046
- Dark Blue Green #005249 ΔE 0.051
- Dark Green Blue #1F6357 ΔE 0.051
- Charcoal #264653 ΔE 0.052
- Dark Teal #014D4E ΔE 0.053
- Dark Grey Blue #29465B ΔE 0.053
Use #375457 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.