#375A75
Closest named color: YInMn Blue (#415A77). oklch(45.3% 0.06 242.9), rgb(55, 90, 117).
Aa
White text reads best on this color (7.28:1).
About this color
#375A75 is a medium-dark, muted blue. In OKLCH its lightness is 45%, its chroma 0.060 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.013 away. White text reads best on it, at 7.28:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.88:1 |
| White text | 7.28:1 |
Values
| HEX | #375A75 |
| RGB | rgb(55, 90, 117) |
| HSL | hsl(206, 36%, 34%) |
| OKLCH | oklch(45.3% 0.06 242.9) |
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 #375A75 | 7.28:1 | AAA | Lc -90.1 | Preferred for body text |
| Black text on #375A75 | 2.88:1 | Fails | Lc 18.8 | Dividers and decoration only |
| #375A75 text on white | 7.28:1 | AAA | Lc 85.2 | Fine for body text |
| #375A75 text on black | 2.88:1 | 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
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CFDBE5
oklch(88.5% 0.019 243)
-
Step 300
300
#AEC4D6
oklch(80.9% 0.035 242.8)
-
Step 400
400
#82A5C1
oklch(70.6% 0.056 242.7)
-
Step 500
500
#628FB2
oklch(63.1% 0.072 242.7)
-
Step 600
600
#48799E
oklch(55.7% 0.079 242.6)
-
Step 700
700
#396587
oklch(49% 0.073 243.4)
-
Step 800
800 (this color)
#375A75
oklch(45.3% 0.06 242.9)
-
Step 900
900
#2B4559
oklch(37.8% 0.047 242.6)
-
Step 950
950
#192834
oklch(26.9% 0.03 243.3)
#375A75 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) | #4E5A76 | 0.030 |
| Deuteranopia (no green cones) | #465475 | 0.025 |
| Tritanopia (no blue cones) | #176163 | 0.050 |
| Achromatopsia (no color) | #565656 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375A75
#375A75
oklch(45.3% 0.06 242.9)
- #6E4F32
#6E4F32
oklch(45.4% 0.06 63.5)
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 #375A75, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.013
- Light Navy Blue #2E5A88 ΔE 0.032
- Dusty Grape #545775 ΔE 0.039
- Denim #3B638C ΔE 0.042
- Dusk #4E5481 ΔE 0.042
- Petrol #005F6A ΔE 0.044
- Denim Blue #3B5B92 ΔE 0.048
- Deep Sea Blue #015482 ΔE 0.049
Use #375A75 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.