#374B75
Closest named color: Light Navy (#155084). oklch(41.6% 0.075 264.1), rgb(55, 75, 117).
Aa
White text reads best on this color (8.65:1).
About this color
#374B75 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.075 and its hue 264°. 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 8.65:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.42:1 |
| White text | 8.65:1 |
Values
| HEX | #374B75 |
| RGB | rgb(55, 75, 117) |
| HSL | hsl(221, 36%, 34%) |
| OKLCH | oklch(41.6% 0.075 264.1) |
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 #374B75 | 8.65:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #374B75 | 2.42:1 | Fails | Lc 14.4 | Not readable |
| #374B75 text on white | 8.65:1 | AAA | Lc 89.6 | Fine for body text |
| #374B75 text on black | 2.42:1 | Fails | Lc -12.6 | 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
#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
#8AA1CD
oklch(70.7% 0.07 263.2)
-
Step 500
500
#6E89C0
oklch(63.2% 0.089 263.9)
-
Step 600
600
#5672AD
oklch(55.6% 0.098 264.1)
-
Step 700
700
#465F94
oklch(49% 0.091 264.2)
-
Step 800
800 (this color)
#374B75
oklch(41.6% 0.075 264.1)
-
Step 900
900
#324161
oklch(37.7% 0.059 264.6)
-
Step 950
950
#1D2639
oklch(27% 0.038 264.5)
#374B75 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) | #3B4F77 | 0.014 |
| Deuteranopia (no green cones) | #344974 | 0.008 |
| Tritanopia (no blue cones) | #1B545A | 0.068 |
| Achromatopsia (no color) | #4B4B4B | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374B75
#374B75
oklch(41.6% 0.075 264.1)
- #5F4813
#5F4813
oklch(41.6% 0.075 84.2)
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 #374B75, 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 0.043
- Deep Sea Blue #015482 ΔE 0.044
- Dusk #4E5481 ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.048
- YInMn Blue #415A77 ΔE 0.049
- Dark Grey Blue #29465B ΔE 0.050
- Twilight Blue #0A437A ΔE 0.052
Use #374B75 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.