#375E63
Closest named color: Petrol (#005F6A). oklch(45.5% 0.045 206.1), rgb(55, 94, 99).
Aa
White text reads best on this color (7.13:1).
About this color
#375E63 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 46%, its chroma 0.045 and its hue 206°. 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 7.13:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.94:1 |
| White text | 7.13:1 |
Values
| HEX | #375E63 |
| RGB | rgb(55, 94, 99) |
| HSL | hsl(187, 29%, 30%) |
| OKLCH | oklch(45.5% 0.045 206.1) |
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 #375E63 | 7.13:1 | AAA | Lc -89.6 | Fine for body text |
| Black text on #375E63 | 2.94:1 | Fails | Lc 19.4 | Dividers and decoration only |
| #375E63 text on white | 7.13:1 | AAA | Lc 84.7 | Fine for body text |
| #375E63 text on black | 2.94:1 | Fails | Lc -17.3 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E4EBEC
oklch(93.5% 0.008 207.1)
-
Step 200
200
#CFDCDE
oklch(88.5% 0.014 207.9)
-
Step 300
300
#AEC6C9
oklch(80.9% 0.026 205.8)
-
Step 400
400
#82A9AD
oklch(70.8% 0.043 204)
-
Step 500
500
#629399
oklch(63.1% 0.053 205.6)
-
Step 600
600
#477D84
oklch(55.5% 0.058 206.3)
-
Step 700
700
#386A70
oklch(49.2% 0.055 205.6)
-
Step 800
800 (this color)
#375E63
oklch(45.5% 0.045 206.1)
-
Step 900
900
#2A474B
oklch(37.7% 0.035 206.9)
-
Step 950
950
#192A2C
oklch(27.1% 0.023 205.2)
#375E63 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) | #585B63 | 0.044 |
| Deuteranopia (no green cones) | #515563 | 0.042 |
| Tritanopia (no blue cones) | #23615F | 0.022 |
| Achromatopsia (no color) | #585858 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375E63
#375E63
oklch(45.5% 0.045 206.1)
- #6E4D4A
#6E4D4A
oklch(45.5% 0.045 24.8)
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 #375E63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.033
- Dark Green Blue #1F6357 ΔE 0.037
- Dark Aqua #05696B ΔE 0.040
- YInMn Blue #415A77 ΔE 0.042
- Slate #516572 ΔE 0.047
- Deep Teal #00555A ΔE 0.052
- Dark Slate Gray #2F4F4F ΔE 0.053
- Dusty Grape #545775 ΔE 0.057
Use #375E63 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.