#375B69
Closest named color: YInMn Blue (#415A77). oklch(45% 0.047 224.7), rgb(55, 91, 105).
Aa
White text reads best on this color (7.33:1).
About this color
#375B69 is a dark, muted teal or cyan. In OKLCH its lightness is 45%, its chroma 0.047 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.028 away. White text reads best on it, at 7.33:1.
| Hue family | Teals and cyans |
| Lightness | dark (45%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.86:1 |
| White text | 7.33:1 |
Values
| HEX | #375B69 |
| RGB | rgb(55, 91, 105) |
| HSL | hsl(197, 31%, 31%) |
| OKLCH | oklch(45% 0.047 224.7) |
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 #375B69 | 7.33:1 | AAA | Lc -90.3 | Preferred for body text |
| Black text on #375B69 | 2.86:1 | Fails | Lc 18.6 | Dividers and decoration only |
| #375B69 text on white | 7.33:1 | AAA | Lc 85.4 | Fine for body text |
| #375B69 text on black | 2.86:1 | Fails | Lc -16.6 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBEE
oklch(93.6% 0.009 225.1)
-
Step 200
200
#CFDBE1
oklch(88.4% 0.015 229)
-
Step 300
300
#AFC5CE
oklch(81% 0.027 224.3)
-
Step 400
400
#83A7B5
oklch(70.7% 0.044 223.6)
-
Step 500
500
#6491A3
oklch(63.1% 0.056 224.9)
-
Step 600
600
#497B8E
oklch(55.5% 0.061 224.4)
-
Step 700
700
#3A6879
oklch(49.1% 0.057 224)
-
Step 800
800 (this color)
#375B69
oklch(45% 0.047 224.7)
-
Step 900
900
#2B4650
oklch(37.7% 0.037 223.4)
-
Step 950
950
#1A292F
oklch(27% 0.023 224.8)
#375B69 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) | #53596A | 0.037 |
| Deuteranopia (no green cones) | #4C5469 | 0.033 |
| Tritanopia (no blue cones) | #205F5F | 0.032 |
| Achromatopsia (no color) | #565656 | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375B69
#375B69
oklch(45% 0.047 224.7)
- #6C4D3F
#6C4D3F
oklch(45% 0.048 45.3)
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 #375B69, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.028
- Petrol #005F6A ΔE 0.034
- Dusty Grape #545775 ΔE 0.047
- Slate #516572 ΔE 0.049
- Dark Aqua #05696B ΔE 0.049
- Dark Green Blue #1F6357 ΔE 0.050
- Deep Teal #00555A ΔE 0.052
- Dark Slate Gray #2F4F4F ΔE 0.052
Use #375B69 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.