#375D66
Closest named color: Petrol (#005F6A). oklch(45.4% 0.046 214.5), rgb(55, 93, 102).
Aa
White text reads best on this color (7.19:1).
About this color
#375D66 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 45%, its chroma 0.046 and its hue 214°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.033 away. White text reads best on it, at 7.19:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.92:1 |
| White text | 7.19:1 |
Values
| HEX | #375D66 |
| RGB | rgb(55, 93, 102) |
| HSL | hsl(191, 30%, 31%) |
| OKLCH | oklch(45.4% 0.046 214.5) |
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 #375D66 | 7.19:1 | AAA | Lc -89.8 | Fine for body text |
| Black text on #375D66 | 2.92:1 | Fails | Lc 19.1 | Dividers and decoration only |
| #375D66 text on white | 7.19:1 | AAA | Lc 84.9 | Fine for body text |
| #375D66 text on black | 2.92:1 | Fails | Lc -17.1 | Dividers and decoration only |
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
#E4EBED
oklch(93.5% 0.008 216.6)
-
Step 200
200
#CFDCDF
oklch(88.6% 0.015 213.1)
-
Step 300
300
#AEC5CB
oklch(80.8% 0.026 215.2)
-
Step 400
400
#83A8B1
oklch(70.7% 0.042 214.2)
-
Step 500
500
#62929E
oklch(63% 0.055 215.1)
-
Step 600
600
#487C89
oklch(55.5% 0.059 215.6)
-
Step 700
700
#396974
oklch(49.1% 0.055 214.2)
-
Step 800
800 (this color)
#375D66
oklch(45.4% 0.046 214.5)
-
Step 900
900
#2B474D
oklch(37.8% 0.035 212.7)
-
Step 950
950
#19292D
oklch(26.9% 0.023 215.1)
#375D66 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) | #565B67 | 0.041 |
| Deuteranopia (no green cones) | #4F5566 | 0.038 |
| Tritanopia (no blue cones) | #226160 | 0.026 |
| Achromatopsia (no color) | #575757 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375D66
#375D66
oklch(45.4% 0.046 214.5)
- #6D4D45
#6D4D45
oklch(45.3% 0.046 34.5)
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 #375D66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.033
- YInMn Blue #415A77 ΔE 0.035
- Dark Green Blue #1F6357 ΔE 0.042
- Dark Aqua #05696B ΔE 0.043
- Slate #516572 ΔE 0.046
- Deep Teal #00555A ΔE 0.052
- Dusty Grape #545775 ΔE 0.053
- Dark Slate Gray #2F4F4F ΔE 0.053
Use #375D66 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.