#375665
Closest named color: YInMn Blue (#415A77). oklch(43.5% 0.044 229.9), rgb(55, 86, 101).
Aa
White text reads best on this color (7.83:1).
About this color
#375665 is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.044 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.034 away. White text reads best on it, at 7.83:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.68:1 |
| White text | 7.83:1 |
Values
| HEX | #375665 |
| RGB | rgb(55, 86, 101) |
| HSL | hsl(200, 29%, 31%) |
| OKLCH | oklch(43.5% 0.044 229.9) |
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 #375665 | 7.83:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #375665 | 2.68:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #375665 text on white | 7.83:1 | AAA | Lc 87.1 | Fine for body text |
| #375665 text on black | 2.68:1 | Fails | Lc -15.0 | 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
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#D0DBE1
oklch(88.5% 0.015 231.2)
-
Step 300
300
#B0C4CE
oklch(80.8% 0.026 229.2)
-
Step 400
400
#87A6B6
oklch(70.7% 0.041 230.5)
-
Step 500
500
#6890A4
oklch(63.1% 0.053 230.3)
-
Step 600
600
#4F7A8F
oklch(55.6% 0.058 230.2)
-
Step 700
700
#406779
oklch(49.2% 0.053 228.9)
-
Step 800
800 (this color)
#375665
oklch(43.5% 0.044 229.9)
-
Step 900
900
#2E4550
oklch(37.6% 0.034 229.3)
-
Step 950
950
#1B292F
oklch(27.1% 0.022 226.4)
#375665 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) | #4E5566 | 0.031 |
| Deuteranopia (no green cones) | #485065 | 0.028 |
| Tritanopia (no blue cones) | #245A5B | 0.031 |
| Achromatopsia (no color) | #525252 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375665
#375665
oklch(43.5% 0.044 229.9)
- #654A3B
#654A3B
oklch(43.4% 0.044 50.2)
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 #375665, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.034
- Petrol #005F6A ΔE 0.040
- Dark Slate Gray #2F4F4F ΔE 0.041
- Deep Teal #00555A ΔE 0.045
- Dusty Grape #545775 ΔE 0.050
- Dark Grey Blue #29465B ΔE 0.055
- Light Navy Blue #2E5A88 ΔE 0.056
- Dark Green Blue #1F6357 ΔE 0.058
Use #375665 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.