#375A7B
Closest named color: YInMn Blue (#415A77). oklch(45.6% 0.068 248.1), rgb(55, 90, 123).
Aa
White text reads best on this color (7.21:1).
About this color
#375A7B is a medium-dark, muted blue. In OKLCH its lightness is 46%, its chroma 0.068 and its hue 248°. 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 7.21:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.91:1 |
| White text | 7.21:1 |
Values
| HEX | #375A7B |
| RGB | rgb(55, 90, 123) |
| HSL | hsl(209, 38%, 35%) |
| OKLCH | oklch(45.6% 0.068 248.1) |
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 #375A7B | 7.21:1 | AAA | Lc -89.8 | Fine for body text |
| Black text on #375A7B | 2.91:1 | Fails | Lc 19.1 | Dividers and decoration only |
| #375A7B text on white | 7.21:1 | AAA | Lc 84.9 | Fine for body text |
| #375A7B text on black | 2.91:1 | Fails | Lc -17.1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CEDBE7
oklch(88.5% 0.022 245.9)
-
Step 300
300
#ADC3DA
oklch(80.8% 0.041 249.5)
-
Step 400
400
#82A5C7
oklch(70.8% 0.063 248)
-
Step 500
500
#618EB8
oklch(63.1% 0.08 247.5)
-
Step 600
600
#4777A5
oklch(55.5% 0.089 248.7)
-
Step 700
700
#38648D
oklch(49% 0.082 248.3)
-
Step 800
800 (this color)
#375A7B
oklch(45.6% 0.068 248.1)
-
Step 900
900
#2A445C
oklch(37.7% 0.052 247.5)
-
Step 950
950
#192836
oklch(27% 0.033 247.4)
#375A7B 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) | #4C5B7C | 0.027 |
| Deuteranopia (no green cones) | #43547A | 0.021 |
| Tritanopia (no blue cones) | #0F6265 | 0.059 |
| Achromatopsia (no color) | #575757 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375A7B
#375A7B
oklch(45.6% 0.068 248.1)
- #704F2B
#704F2B
oklch(45.5% 0.068 67.1)
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 #375A7B, 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 0.023
- Denim #3B638C ΔE 0.035
- Dusk #4E5481 ΔE 0.036
- Dusty Grape #545775 ΔE 0.038
- Denim Blue #3B5B92 ΔE 0.038
- Dusk Blue #26538D ΔE 0.044
- Deep Sea Blue #015482 ΔE 0.045
Use #375A7B 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.