#374E82
Closest named color: Dusk Blue (#26538D). oklch(43.1% 0.091 264.8), rgb(55, 78, 130).
Aa
White text reads best on this color (8.15:1).
About this color
#374E82 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.091 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.025 away. White text reads best on it, at 8.15:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.57:1 |
| White text | 8.15:1 |
Values
| HEX | #374E82 |
| RGB | rgb(55, 78, 130) |
| HSL | hsl(222, 41%, 36%) |
| OKLCH | oklch(43.1% 0.091 264.8) |
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 #374E82 | 8.15:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #374E82 | 2.57:1 | Fails | Lc 15.9 | Dividers and decoration only |
| #374E82 text on white | 8.15:1 | AAA | Lc 88.1 | Fine for body text |
| #374E82 text on black | 2.57:1 | Fails | Lc -14.1 | 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
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D0D9ED
oklch(88.5% 0.029 266.4)
-
Step 300
300
#B0C1E4
oklch(81% 0.053 264.7)
-
Step 400
400
#86A0D6
oklch(70.6% 0.085 264.4)
-
Step 500
500
#6988CC
oklch(63.2% 0.109 264.8)
-
Step 600
600
#5170B8
oklch(55.5% 0.118 265.2)
-
Step 700
700
#415E9F
oklch(49.1% 0.11 264.6)
-
Step 800
800 (this color)
#374E82
oklch(43.1% 0.091 264.8)
-
Step 900
900
#2F4067
oklch(37.6% 0.071 265.3)
-
Step 950
950
#1B263C
oklch(27% 0.044 263.4)
#374E82 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) | #395384 | 0.015 |
| Deuteranopia (no green cones) | #2F4C81 | 0.012 |
| Tritanopia (no blue cones) | #075961 | 0.082 |
| Achromatopsia (no color) | #4F4F4F | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374E82
#374E82
oklch(43.1% 0.091 264.8)
- #664B00
#664B00
oklch(43% 0.088 84.8)
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 #374E82, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.025
- Light Navy #155084 ΔE 0.030
- Light Navy Blue #2E5A88 ΔE 0.035
- Twilight #4E518B ΔE 0.037
- Dusk #4E5481 ΔE 0.039
- Deep Sea Blue #015482 ΔE 0.039
- Cobalt #1E488F ΔE 0.041
- Denim Blue #3B5B92 ΔE 0.043
Use #374E82 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.