#374F86
Closest named color: Dusk Blue (#26538D). oklch(43.6% 0.096 264.9), rgb(55, 79, 134).
Aa
White text reads best on this color (7.99:1).
About this color
#374F86 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.096 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.021 away. White text reads best on it, at 7.99:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.62:1 |
| White text | 7.99:1 |
Values
| HEX | #374F86 |
| RGB | rgb(55, 79, 134) |
| HSL | hsl(222, 42%, 37%) |
| OKLCH | oklch(43.6% 0.096 264.9) |
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 #374F86 | 7.99:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #374F86 | 2.62:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #374F86 text on white | 7.99:1 | AAA | Lc 87.6 | Fine for body text |
| #374F86 text on black | 2.62:1 | Fails | Lc -14.6 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CFD9EE
oklch(88.4% 0.031 265.3)
-
Step 300
300
#AFC1E6
oklch(81% 0.056 264.7)
-
Step 400
400
#85A0D9
oklch(70.7% 0.089 264.7)
-
Step 500
500
#6787CF
oklch(63% 0.115 265.1)
-
Step 600
600
#4F70BC
oklch(55.6% 0.124 264.9)
-
Step 700
700
#405DA2
oklch(49% 0.116 265.2)
-
Step 800
800 (this color)
#374F86
oklch(43.6% 0.096 264.9)
-
Step 900
900
#2E4069
oklch(37.7% 0.074 265.1)
-
Step 950
950
#1B263E
oklch(27.1% 0.048 264.7)
#374F86 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) | #385488 | 0.015 |
| Deuteranopia (no green cones) | #2E4D85 | 0.013 |
| Tritanopia (no blue cones) | #005B64 | 0.085 |
| Achromatopsia (no color) | #515151 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374F86
#374F86
oklch(43.6% 0.096 264.9)
- #684D00
#684D00
oklch(43.7% 0.09 85.3)
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 #374F86, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.021
- Light Navy #155084 ΔE 0.031
- Light Navy Blue #2E5A88 ΔE 0.032
- Twilight #4E518B ΔE 0.034
- Dusk #4E5481 ΔE 0.038
- Denim Blue #3B5B92 ΔE 0.038
- Cobalt #1E488F ΔE 0.039
- Deep Sea Blue #015482 ΔE 0.040
Use #374F86 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.