#375B6D
Closest named color: YInMn Blue (#415A77). oklch(45.2% 0.051 231.1), rgb(55, 91, 109).
Aa
White text reads best on this color (7.29:1).
About this color
#375B6D is a medium-dark, muted blue. In OKLCH its lightness is 45%, its chroma 0.051 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.022 away. White text reads best on it, at 7.29:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.87:1 |
| White text | 7.29:1 |
Values
| HEX | #375B6D |
| RGB | rgb(55, 91, 109) |
| HSL | hsl(200, 33%, 32%) |
| OKLCH | oklch(45.2% 0.051 231.1) |
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 #375B6D | 7.29:1 | AAA | Lc -90.1 | Preferred for body text |
| Black text on #375B6D | 2.87:1 | Fails | Lc 18.8 | Dividers and decoration only |
| #375B6D text on white | 7.29:1 | AAA | Lc 85.2 | Fine for body text |
| #375B6D text on black | 2.87:1 | Fails | Lc -16.8 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CFDBE2
oklch(88.4% 0.016 233)
-
Step 300
300
#AEC5D1
oklch(81% 0.03 230.4)
-
Step 400
400
#83A7B9
oklch(70.8% 0.047 229.9)
-
Step 500
500
#6391A8
oklch(63.2% 0.061 230.6)
-
Step 600
600
#497A93
oklch(55.5% 0.066 231.9)
-
Step 700
700
#3A677D
oklch(49.1% 0.061 231)
-
Step 800
800 (this color)
#375B6D
oklch(45.2% 0.051 231.1)
-
Step 900
900
#2B4653
oklch(37.8% 0.04 229.9)
-
Step 950
950
#1A2931
oklch(27.1% 0.025 232.2)
#375B6D 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) | #525A6E | 0.035 |
| Deuteranopia (no green cones) | #4A546D | 0.031 |
| Tritanopia (no blue cones) | #1D6061 | 0.037 |
| Achromatopsia (no color) | #565656 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375B6D
#375B6D
oklch(45.2% 0.051 231.1)
- #6D4E3C
#6D4E3C
oklch(45.3% 0.051 51.2)
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 #375B6D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.022
- Petrol #005F6A ΔE 0.036
- Dusty Grape #545775 ΔE 0.044
- Light Navy Blue #2E5A88 ΔE 0.046
- Slate #516572 ΔE 0.048
- Dark Aqua #05696B ΔE 0.051
- Denim #3B638C ΔE 0.052
- Dusk #4E5481 ΔE 0.054
Use #375B6D 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.