#375178
Closest named color: YInMn Blue (#415A77). oklch(43.2% 0.072 258.3), rgb(55, 81, 120).
Aa
White text reads best on this color (8.04:1).
About this color
#375178 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.072 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.032 away. White text reads best on it, at 8.04:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.61:1 |
| White text | 8.04:1 |
Values
| HEX | #375178 |
| RGB | rgb(55, 81, 120) |
| HSL | hsl(216, 37%, 34%) |
| OKLCH | oklch(43.2% 0.072 258.3) |
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 #375178 | 8.04:1 | AAA | Lc -92.4 | Preferred for body text |
| Black text on #375178 | 2.61:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #375178 text on white | 8.04:1 | AAA | Lc 87.8 | Fine for body text |
| #375178 text on black | 2.61:1 | Fails | Lc -14.4 | Not readable |
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
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D0DAE9
oklch(88.5% 0.023 258.4)
-
Step 300
300
#B0C2DC
oklch(80.9% 0.042 257.5)
-
Step 400
400
#87A2CB
oklch(70.7% 0.068 258.6)
-
Step 500
500
#698BBE
oklch(63.2% 0.086 258.3)
-
Step 600
600
#5074AA
oklch(55.6% 0.094 258.3)
-
Step 700
700
#416192
oklch(49.1% 0.088 258.7)
-
Step 800
800 (this color)
#375178
oklch(43.2% 0.072 258.3)
-
Step 900
900
#2F425F
oklch(37.7% 0.056 258.6)
-
Step 950
950
#1B2738
oklch(27% 0.036 257.1)
#375178 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) | #42547A | 0.018 |
| Deuteranopia (no green cones) | #3A4D77 | 0.012 |
| Tritanopia (no blue cones) | #165A5F | 0.065 |
| Achromatopsia (no color) | #505050 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375178
#375178
oklch(43.2% 0.072 258.3)
- #664B1C
#664B1C
oklch(43.2% 0.073 78.4)
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 #375178, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.032
- Light Navy Blue #2E5A88 ΔE 0.033
- Light Navy #155084 ΔE 0.036
- Dusk Blue #26538D ΔE 0.037
- Dusk #4E5481 ΔE 0.037
- Deep Sea Blue #015482 ΔE 0.038
- Twilight #4E518B ΔE 0.046
- Dusty Grape #545775 ΔE 0.047
Use #375178 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.