#374C75
Closest named color: Light Navy (#155084). oklch(41.9% 0.074 262.9), rgb(55, 76, 117).
Aa
White text reads best on this color (8.56:1).
About this color
#374C75 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.074 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.037 away. White text reads best on it, at 8.56:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.45:1 |
| White text | 8.56:1 |
Values
| HEX | #374C75 |
| RGB | rgb(55, 76, 117) |
| HSL | hsl(220, 36%, 34%) |
| OKLCH | oklch(41.9% 0.074 262.9) |
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 #374C75 | 8.56:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #374C75 | 2.45:1 | Fails | Lc 14.6 | Not readable |
| #374C75 text on white | 8.56:1 | AAA | Lc 89.3 | Fine for body text |
| #374C75 text on black | 2.45:1 | Fails | Lc -12.9 | 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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D1D9E9
oklch(88.4% 0.024 264.4)
-
Step 300
300
#B2C1DD
oklch(80.9% 0.043 263)
-
Step 400
400
#8AA1CC
oklch(70.7% 0.068 262.8)
-
Step 500
500
#6D89BF
oklch(63% 0.088 263)
-
Step 600
600
#5572AC
oklch(55.5% 0.097 263.3)
-
Step 700
700
#456093
oklch(49.1% 0.088 262.4)
-
Step 800
800 (this color)
#374C75
oklch(41.9% 0.074 262.9)
-
Step 900
900
#314160
oklch(37.6% 0.057 263)
-
Step 950
950
#1D2638
oklch(26.9% 0.036 263.7)
#374C75 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) | #3C4F77 | 0.012 |
| Deuteranopia (no green cones) | #354A74 | 0.007 |
| Tritanopia (no blue cones) | #1A555B | 0.066 |
| Achromatopsia (no color) | #4C4C4C | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374C75
#374C75
oklch(41.9% 0.074 262.9)
- #604916
#604916
oklch(42% 0.074 83.7)
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 #374C75, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.037
- Dusk Blue #26538D ΔE 0.042
- Deep Sea Blue #015482 ΔE 0.043
- Dusk #4E5481 ΔE 0.046
- Light Navy Blue #2E5A88 ΔE 0.046
- YInMn Blue #415A77 ΔE 0.046
- Dark Grey Blue #29465B ΔE 0.050
- Twilight #4E518B ΔE 0.052
Use #374C75 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.