#375561
Closest named color: Dark Slate Gray (#2F4F4F). oklch(43.1% 0.041 225.1), rgb(55, 85, 97).
Aa
White text reads best on this color (7.97:1).
About this color
#375561 is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.041 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.034 away. White text reads best on it, at 7.97:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.63:1 |
| White text | 7.97:1 |
Values
| HEX | #375561 |
| RGB | rgb(55, 85, 97) |
| HSL | hsl(197, 28%, 30%) |
| OKLCH | oklch(43.1% 0.041 225.1) |
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 #375561 | 7.97:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #375561 | 2.63:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #375561 text on white | 7.97:1 | AAA | Lc 87.6 | Fine for body text |
| #375561 text on black | 2.63:1 | Fails | Lc -14.6 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBED
oklch(93.6% 0.007 219.6)
-
Step 200
200
#D0DBE0
oklch(88.5% 0.014 226.6)
-
Step 300
300
#B1C4CC
oklch(80.8% 0.024 224.9)
-
Step 400
400
#88A6B3
oklch(70.7% 0.038 226)
-
Step 500
500
#6A90A0
oklch(63.1% 0.048 225.8)
-
Step 600
600
#517A8B
oklch(55.6% 0.053 225.9)
-
Step 700
700
#416776
oklch(49.1% 0.049 224.9)
-
Step 800
800 (this color)
#375561
oklch(43.1% 0.041 225.1)
-
Step 900
900
#2F454E
oklch(37.6% 0.031 225.3)
-
Step 950
950
#1C292E
oklch(27.1% 0.02 223.6)
#375561 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) | #4E5462 | 0.032 |
| Deuteranopia (no green cones) | #484F61 | 0.028 |
| Tritanopia (no blue cones) | #265959 | 0.028 |
| Achromatopsia (no color) | #515151 | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375561
#375561
oklch(43.1% 0.041 225.1)
- #63493E
#63493E
oklch(43% 0.04 44)
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 #375561, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.034
- YInMn Blue #415A77 ΔE 0.040
- Petrol #005F6A ΔE 0.041
- Deep Teal #00555A ΔE 0.042
- Dark Grey Blue #29465B ΔE 0.053
- Dusty Grape #545775 ΔE 0.055
- Charcoal #264653 ΔE 0.056
- Dark Green Blue #1F6357 ΔE 0.056
Use #375561 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.