#374B85
Closest named color: Dusk Blue (#26538D). oklch(42.6% 0.1 267.7), rgb(55, 75, 133).
Aa
White text reads best on this color (8.37:1).
About this color
#374B85 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.100 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.027 away. White text reads best on it, at 8.37:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.50:1 |
| White text | 8.37:1 |
Values
| HEX | #374B85 |
| RGB | rgb(55, 75, 133) |
| HSL | hsl(225, 41%, 37%) |
| OKLCH | oklch(42.6% 0.1 267.7) |
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 #374B85 | 8.37:1 | AAA | Lc -93.3 | Preferred for body text |
| Black text on #374B85 | 2.50:1 | Fails | Lc 15.3 | Dividers and decoration only |
| #374B85 text on white | 8.37:1 | AAA | Lc 88.7 | Fine for body text |
| #374B85 text on black | 2.50:1 | Fails | Lc -13.5 | 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
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D0D9EF
oklch(88.5% 0.032 268)
-
Step 300
300
#B0C0E7
oklch(80.9% 0.058 267.6)
-
Step 400
400
#879FDB
oklch(70.7% 0.092 267.3)
-
Step 500
500
#6A86D2
oklch(63.2% 0.119 267.6)
-
Step 600
600
#526EBF
oklch(55.6% 0.13 267.7)
-
Step 700
700
#435CA4
oklch(49.1% 0.119 267.5)
-
Step 800
800 (this color)
#374B85
oklch(42.6% 0.1 267.7)
-
Step 900
900
#303F6B
oklch(37.7% 0.078 268.3)
-
Step 950
950
#1C253E
oklch(26.9% 0.049 268)
#374B85 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) | #325187 | 0.017 |
| Deuteranopia (no green cones) | #284A84 | 0.018 |
| Tritanopia (no blue cones) | #025861 | 0.090 |
| Achromatopsia (no color) | #4E4E4E | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374B85
#374B85
oklch(42.6% 0.1 267.7)
- #634B00
#634B00
oklch(42.6% 0.087 87.5)
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 #374B85, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.027
- Light Navy #155084 ΔE 0.032
- Cobalt #1E488F ΔE 0.033
- Twilight #4E518B ΔE 0.040
- Light Navy Blue #2E5A88 ΔE 0.043
- Deep Sea Blue #015482 ΔE 0.044
- Dark Slate Blue #483D8B ΔE 0.045
- Dusk #4E5481 ΔE 0.045
Use #374B85 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.