#375C78
Closest named color: YInMn Blue (#415A77). oklch(45.9% 0.063 242.5), rgb(55, 92, 120).
Aa
White text reads best on this color (7.08:1).
About this color
#375C78 is a medium-dark, muted blue. In OKLCH its lightness is 46%, its chroma 0.063 and its hue 242°. 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 7.08:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.96:1 |
| White text | 7.08:1 |
Values
| HEX | #375C78 |
| RGB | rgb(55, 92, 120) |
| HSL | hsl(206, 37%, 34%) |
| OKLCH | oklch(45.9% 0.063 242.5) |
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 #375C78 | 7.08:1 | AAA | Lc -89.4 | Fine for body text |
| Black text on #375C78 | 2.96:1 | Fails | Lc 19.6 | Dividers and decoration only |
| #375C78 text on white | 7.08:1 | AAA | Lc 84.5 | Fine for body text |
| #375C78 text on black | 2.96:1 | Fails | Lc -17.5 | 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 700.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBEF
oklch(93.7% 0.008 236.6)
-
Step 200
200
#D0DBE4
oklch(88.6% 0.017 242.5)
-
Step 300
300
#B0C3D3
oklch(80.8% 0.031 243.5)
-
Step 400
400
#87A5BD
oklch(70.8% 0.048 242.5)
-
Step 500
500
#688EAC
oklch(63% 0.062 242.7)
-
Step 600
600
#4F7898
oklch(55.6% 0.068 242.9)
-
Step 700
700 (this color)
#375C78
oklch(45.9% 0.063 242.5)
-
Step 800
800
#355269
oklch(42.6% 0.052 243.3)
-
Step 900
900
#2E4455
oklch(37.6% 0.04 242.3)
-
Step 950
950
#1B2832
oklch(27% 0.026 242)
#375C78 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) | #505C79 | 0.032 |
| Deuteranopia (no green cones) | #475577 | 0.027 |
| Tritanopia (no blue cones) | #126365 | 0.052 |
| Achromatopsia (no color) | #585858 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375C78
#375C78
oklch(45.9% 0.063 242.5)
- #715032
#715032
oklch(46% 0.063 62.5)
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 #375C78, 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 0.030
- Denim #3B638C ΔE 0.036
- Dusty Grape #545775 ΔE 0.039
- Dusk #4E5481 ΔE 0.042
- Denim Blue #3B5B92 ΔE 0.045
- Petrol #005F6A ΔE 0.045
- Slate #516572 ΔE 0.047
Use #375C78 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.