#375661
Closest named color: Dark Slate Gray (#2F4F4F). oklch(43.4% 0.041 222.3), rgb(55, 86, 97).
Aa
White text reads best on this color (7.87:1).
About this color
#375661 is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.041 and its hue 222°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.036 away. White text reads best on it, at 7.87:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.66:1 |
| White text | 7.87:1 |
Values
| HEX | #375661 |
| RGB | rgb(55, 86, 97) |
| HSL | hsl(196, 28%, 30%) |
| OKLCH | oklch(43.4% 0.041 222.3) |
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 #375661 | 7.87:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #375661 | 2.66:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #375661 text on white | 7.87:1 | AAA | Lc 87.3 | Fine for body text |
| #375661 text on black | 2.66:1 | Fails | Lc -14.8 | 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
#D0DBDF
oklch(88.4% 0.013 221.4)
-
Step 300
300
#B1C4CC
oklch(80.8% 0.024 224.9)
-
Step 400
400
#87A6B2
oklch(70.6% 0.038 223.4)
-
Step 500
500
#69919F
oklch(63.2% 0.049 221.6)
-
Step 600
600
#507B8A
oklch(55.7% 0.053 222)
-
Step 700
700
#406775
oklch(49% 0.049 222.8)
-
Step 800
800 (this color)
#375661
oklch(43.4% 0.041 222.3)
-
Step 900
900
#2F464E
oklch(37.9% 0.032 221.6)
-
Step 950
950
#1C292E
oklch(27.1% 0.02 223.6)
#375661 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) | #505462 | 0.035 |
| Deuteranopia (no green cones) | #494F61 | 0.031 |
| Tritanopia (no blue cones) | #265A59 | 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°).
- #375661
#375661
oklch(43.4% 0.041 222.3)
- #644A3F
#644A3F
oklch(43.4% 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 #375661, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.036
- YInMn Blue #415A77 ΔE 0.040
- Petrol #005F6A ΔE 0.040
- Deep Teal #00555A ΔE 0.042
- Dark Green Blue #1F6357 ΔE 0.053
- Dusty Grape #545775 ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.055
- Charcoal #264653 ΔE 0.058
Use #375661 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.