#374A74
Closest named color: Light Navy (#155084). oklch(41.3% 0.075 264.8), rgb(55, 74, 116).
Aa
White text reads best on this color (8.77:1).
About this color
#374A74 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.075 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.039 away. White text reads best on it, at 8.77:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.39:1 |
| White text | 8.77:1 |
Values
| HEX | #374A74 |
| RGB | rgb(55, 74, 116) |
| HSL | hsl(221, 36%, 34%) |
| OKLCH | oklch(41.3% 0.075 264.8) |
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 #374A74 | 8.77:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #374A74 | 2.39:1 | Fails | Lc 14.0 | Not readable |
| #374A74 text on white | 8.77:1 | AAA | Lc 89.9 | Fine for body text |
| #374A74 text on black | 2.39:1 | Fails | Lc -12.3 | 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
#E6EAF3
oklch(93.7% 0.013 266.7)
-
Step 200
200
#D1D9EA
oklch(88.4% 0.025 265.6)
-
Step 300
300
#B3C1DE
oklch(81% 0.044 264.9)
-
Step 400
400
#8BA0CD
oklch(70.6% 0.07 265.2)
-
Step 500
500
#6F89C0
oklch(63.2% 0.089 264.6)
-
Step 600
600
#5772AC
oklch(55.7% 0.096 264.5)
-
Step 700
700
#475F94
oklch(49.1% 0.09 264.8)
-
Step 800
800 (this color)
#374A74
oklch(41.3% 0.075 264.8)
-
Step 900
900
#324161
oklch(37.7% 0.059 264.6)
-
Step 950
950
#1D2639
oklch(27% 0.038 264.5)
#374A74 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) | #3A4E76 | 0.013 |
| Deuteranopia (no green cones) | #334873 | 0.009 |
| Tritanopia (no blue cones) | #1C5359 | 0.067 |
| Achromatopsia (no color) | #4B4B4B | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374A74
#374A74
oklch(41.3% 0.075 264.8)
- #5E4812
#5E4812
oklch(41.5% 0.075 85.5)
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 #374A74, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.039
- Dusk Blue #26538D ΔE 0.046
- Deep Sea Blue #015482 ΔE 0.046
- Dark Grey Blue #29465B ΔE 0.048
- Dusk #4E5481 ΔE 0.050
- Twilight Blue #0A437A ΔE 0.050
- Light Navy Blue #2E5A88 ΔE 0.051
- YInMn Blue #415A77 ΔE 0.052
Use #374A74 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.