#374E9A
Closest named color: Dusk Blue (#26538D). oklch(44.7% 0.127 268.3), rgb(55, 78, 154).
Aa
White text reads best on this color (7.72:1).
About this color
#374E9A is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.127 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.032 away. White text reads best on it, at 7.72:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.71:1 |
| White text | 7.72:1 |
Values
| HEX | #374E9A |
| RGB | rgb(55, 78, 154) |
| HSL | hsl(226, 47%, 41%) |
| OKLCH | oklch(44.7% 0.127 268.3) |
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 #374E9A | 7.72:1 | AAA | Lc -91.3 | Preferred for body text |
| Black text on #374E9A | 2.71:1 | Fails | Lc 17.5 | Dividers and decoration only |
| #374E9A text on white | 7.72:1 | AAA | Lc 86.6 | Fine for body text |
| #374E9A text on black | 2.71:1 | Fails | Lc -15.5 | Dividers and decoration only |
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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E4EAF9
oklch(93.7% 0.021 268.4)
-
Step 200
200
#CDD9F5
oklch(88.5% 0.041 267.1)
-
Step 300
300
#ACC0F1
oklch(81% 0.073 267.4)
-
Step 400
400
#819DEB
oklch(70.7% 0.119 268.2)
-
Step 500
500
#6383E4
oklch(63.2% 0.15 268.2)
-
Step 600
600
#4B6AD2
oklch(55.6% 0.164 268.2)
-
Step 700
700
#3C58B6
oklch(49.1% 0.152 267.9)
-
Step 800
800 (this color)
#374E9A
oklch(44.7% 0.127 268.3)
-
Step 900
900
#2B3D76
oklch(37.7% 0.1 268.2)
-
Step 950
950
#192445
oklch(26.9% 0.063 268.1)
#374E9A 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) | #26579D | 0.027 |
| Deuteranopia (no green cones) | #124F98 | 0.032 |
| Tritanopia (no blue cones) | #005F6C | 0.107 |
| Achromatopsia (no color) | #535353 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374E9A
#374E9A
oklch(44.7% 0.127 268.3)
- #695100
#695100
oklch(44.7% 0.091 88.8)
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 #374E9A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.032
- Blueberry #464196 ΔE 0.037
- Cobalt #1E488F ΔE 0.038
- Twilight #4E518B ΔE 0.042
- Denim Blue #3B5B92 ΔE 0.042
- Light Navy Blue #2E5A88 ΔE 0.050
- Light Navy #155084 ΔE 0.050
- Dark Slate Blue #483D8B ΔE 0.051
Use #374E9A 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.