#374C77
Closest named color: Light Navy (#155084). oklch(42% 0.077 263.6), rgb(55, 76, 119).
Aa
White text reads best on this color (8.52:1).
About this color
#374C77 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.077 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.035 away. White text reads best on it, at 8.52:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.46:1 |
| White text | 8.52:1 |
Values
| HEX | #374C77 |
| RGB | rgb(55, 76, 119) |
| HSL | hsl(220, 37%, 34%) |
| OKLCH | oklch(42% 0.077 263.6) |
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 #374C77 | 8.52:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #374C77 | 2.46:1 | Fails | Lc 14.8 | Not readable |
| #374C77 text on white | 8.52:1 | AAA | Lc 89.2 | Fine for body text |
| #374C77 text on black | 2.46:1 | Fails | Lc -13.0 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D1D9EA
oklch(88.4% 0.025 265.6)
-
Step 300
300
#B2C1DE
oklch(80.9% 0.044 263.6)
-
Step 400
400
#8AA1CE
oklch(70.8% 0.071 263.6)
-
Step 500
500
#6D89C1
oklch(63.1% 0.091 263.6)
-
Step 600
600
#5572AE
oklch(55.6% 0.1 263.8)
-
Step 700
700
#455F95
oklch(49% 0.093 263.8)
-
Step 800
800 (this color)
#374C77
oklch(42% 0.077 263.6)
-
Step 900
900
#314162
oklch(37.7% 0.061 264)
-
Step 950
950
#1D2639
oklch(27% 0.038 264.5)
#374C77 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) | #3B5079 | 0.014 |
| Deuteranopia (no green cones) | #344A76 | 0.008 |
| Tritanopia (no blue cones) | #19555C | 0.068 |
| Achromatopsia (no color) | #4C4C4C | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374C77
#374C77
oklch(42% 0.077 263.6)
- #614912
#614912
oklch(42% 0.077 83.8)
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 #374C77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.035
- Dusk Blue #26538D ΔE 0.040
- Deep Sea Blue #015482 ΔE 0.042
- Light Navy Blue #2E5A88 ΔE 0.045
- Dusk #4E5481 ΔE 0.045
- YInMn Blue #415A77 ΔE 0.047
- Twilight #4E518B ΔE 0.049
- Cobalt #1E488F ΔE 0.051
Use #374C77 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.