#375A77
Closest named color: YInMn Blue (#415A77). oklch(45.4% 0.063 244.8), rgb(55, 90, 119).
Aa
White text reads best on this color (7.26:1).
About this color
#375A77 is a medium-dark, muted blue. In OKLCH its lightness is 45%, its chroma 0.063 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.012 away. White text reads best on it, at 7.26:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.89:1 |
| White text | 7.26:1 |
Values
| HEX | #375A77 |
| RGB | rgb(55, 90, 119) |
| HSL | hsl(207, 37%, 34%) |
| OKLCH | oklch(45.4% 0.063 244.8) |
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 #375A77 | 7.26:1 | AAA | Lc -90.0 | Preferred for body text |
| Black text on #375A77 | 2.89:1 | Fails | Lc 18.9 | Dividers and decoration only |
| #375A77 text on white | 7.26:1 | AAA | Lc 85.1 | Fine for body text |
| #375A77 text on black | 2.89:1 | Fails | Lc -16.9 | 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
#CEDBE6
oklch(88.5% 0.021 243.4)
-
Step 300
300
#AEC4D7
oklch(81% 0.036 244.3)
-
Step 400
400
#82A5C3
oklch(70.7% 0.059 244.6)
-
Step 500
500
#628FB4
oklch(63.2% 0.075 244.2)
-
Step 600
600
#4878A0
oklch(55.6% 0.082 245.1)
-
Step 700
700
#396589
oklch(49.1% 0.076 244.9)
-
Step 800
800 (this color)
#375A77
oklch(45.4% 0.063 244.8)
-
Step 900
900
#2B445A
oklch(37.6% 0.049 246.1)
-
Step 950
950
#192835
oklch(27% 0.032 245.5)
#375A77 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) | #4E5A78 | 0.030 |
| Deuteranopia (no green cones) | #455476 | 0.023 |
| Tritanopia (no blue cones) | #146164 | 0.052 |
| Achromatopsia (no color) | #575757 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375A77
#375A77
oklch(45.4% 0.063 244.8)
- #6F4F2F
#6F4F2F
oklch(45.5% 0.063 65.1)
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 #375A77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.012
- Light Navy Blue #2E5A88 ΔE 0.029
- Dusty Grape #545775 ΔE 0.038
- Denim #3B638C ΔE 0.040
- Dusk #4E5481 ΔE 0.040
- Denim Blue #3B5B92 ΔE 0.045
- Petrol #005F6A ΔE 0.046
- Deep Sea Blue #015482 ΔE 0.047
Use #375A77 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.