#375E55
Closest named color: Dark Green Blue (#1F6357). oklch(45% 0.047 177.7), rgb(55, 94, 85).
Aa
White text reads best on this color (7.25:1).
About this color
#375E55 is a dark, muted teal or cyan. In OKLCH its lightness is 45%, its chroma 0.047 and its hue 178°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.023 away. White text reads best on it, at 7.25:1.
| Hue family | Teals and cyans |
| Lightness | dark (45%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.89:1 |
| White text | 7.25:1 |
Values
| HEX | #375E55 |
| RGB | rgb(55, 94, 85) |
| HSL | hsl(166, 26%, 29%) |
| OKLCH | oklch(45% 0.047 177.7) |
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 #375E55 | 7.25:1 | AAA | Lc -90.0 | Fine for body text |
| Black text on #375E55 | 2.89:1 | Fails | Lc 18.9 | Dividers and decoration only |
| #375E55 text on white | 7.25:1 | AAA | Lc 85.1 | Fine for body text |
| #375E55 text on black | 2.89:1 | Fails | Lc -16.9 | 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
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E5ECEA
oklch(93.7% 0.008 177.3)
-
Step 200
200
#CFDDD9
oklch(88.6% 0.016 177)
-
Step 300
300
#AFC7C0
oklch(81% 0.028 176.2)
-
Step 400
400
#84AAA0
oklch(70.7% 0.044 177.1)
-
Step 500
500
#649589
oklch(63.1% 0.056 177.3)
-
Step 600
600
#497F73
oklch(55.5% 0.061 178)
-
Step 700
700
#3A6B60
oklch(49% 0.057 177.6)
-
Step 800
800 (this color)
#375E55
oklch(45% 0.047 177.7)
-
Step 900
900
#2B4841
oklch(37.6% 0.037 177.2)
-
Step 950
950
#1A2A26
oklch(26.9% 0.023 177.2)
#375E55 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) | #5B5A55 | 0.049 |
| Deuteranopia (no green cones) | #545556 | 0.046 |
| Tritanopia (no blue cones) | #2A5F5B | 0.014 |
| Achromatopsia (no color) | #575757 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375E55
#375E55
oklch(45% 0.047 177.7)
- #6B4A55
#6B4A55
oklch(44.9% 0.048 357.5)
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 #375E55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.023
- Petrol #005F6A ΔE 0.044
- Dark Aqua #05696B ΔE 0.045
- Dark Slate Gray #2F4F4F ΔE 0.050
- Deep Teal #00555A ΔE 0.052
- Pine #2B5D34 ΔE 0.054
- Dark Blue Green #005249 ΔE 0.061
- Slate #516572 ΔE 0.061
Use #375E55 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.