#375E66
Closest named color: Petrol (#005F6A). oklch(45.6% 0.046 212.2), rgb(55, 94, 102).
Aa
White text reads best on this color (7.10:1).
About this color
#375E66 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 46%, its chroma 0.046 and its hue 212°. 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 7.10:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.95:1 |
| White text | 7.10:1 |
Values
| HEX | #375E66 |
| RGB | rgb(55, 94, 102) |
| HSL | hsl(190, 30%, 31%) |
| OKLCH | oklch(45.6% 0.046 212.2) |
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 #375E66 | 7.10:1 | AAA | Lc -89.5 | Fine for body text |
| Black text on #375E66 | 2.95:1 | Fails | Lc 19.5 | Dividers and decoration only |
| #375E66 text on white | 7.10:1 | AAA | Lc 84.6 | Fine for body text |
| #375E66 text on black | 2.95:1 | Fails | Lc -17.4 | 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
#AEC6CB
oklch(81% 0.027 211.6)
-
Step 400
400
#82A8B0
oklch(70.6% 0.043 212)
-
Step 500
500
#61939D
oklch(63.2% 0.056 211.5)
-
Step 600
600
#477D88
oklch(55.7% 0.06 212.2)
-
Step 700
700
#386973
oklch(49% 0.055 212.4)
-
Step 800
800 (this color)
#375E66
oklch(45.6% 0.046 212.2)
-
Step 900
900
#2A474D
oklch(37.8% 0.036 212.2)
-
Step 950
950
#19292D
oklch(26.9% 0.023 215.1)
#375E66 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) | #575B66 | 0.042 |
| Deuteranopia (no green cones) | #505666 | 0.039 |
| Tritanopia (no blue cones) | #226160 | 0.025 |
| Achromatopsia (no color) | #585858 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375E66
#375E66
oklch(45.6% 0.046 212.2)
- #6E4E47
#6E4E47
oklch(45.6% 0.045 32.7)
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 #375E66, 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 0.037
- Dark Aqua #05696B ΔE 0.040
- Dark Green Blue #1F6357 ΔE 0.040
- Slate #516572 ΔE 0.045
- Deep Teal #00555A ΔE 0.054
- Dusty Grape #545775 ΔE 0.054
- Dark Slate Gray #2F4F4F ΔE 0.055
Use #375E66 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.