#374591
Closest named color: Blueberry (#464196). oklch(42.2% 0.126 272.1), rgb(55, 69, 145).
Aa
White text reads best on this color (8.66:1).
About this color
#374591 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.126 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.025 away. White text reads best on it, at 8.66:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.42:1 |
| White text | 8.66:1 |
Values
| HEX | #374591 |
| RGB | rgb(55, 69, 145) |
| HSL | hsl(231, 45%, 39%) |
| OKLCH | oklch(42.2% 0.126 272.1) |
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 #374591 | 8.66:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #374591 | 2.42:1 | Fails | Lc 14.5 | Not readable |
| #374591 text on white | 8.66:1 | AAA | Lc 89.5 | Fine for body text |
| #374591 text on black | 2.42:1 | Fails | Lc -12.8 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#CFD8F5
oklch(88.4% 0.041 271.9)
-
Step 300
300
#B0BEF1
oklch(80.8% 0.074 272.7)
-
Step 400
400
#879BEA
oklch(70.6% 0.118 272.3)
-
Step 500
500
#6B81E3
oklch(63.2% 0.149 272)
-
Step 600
600
#5468D1
oklch(55.6% 0.162 272)
-
Step 700
700
#4556B5
oklch(49.2% 0.151 272.1)
-
Step 800
800 (this color)
#374591
oklch(42.2% 0.126 272.1)
-
Step 900
900
#303C75
oklch(37.7% 0.098 272)
-
Step 950
950
#1C2444
oklch(27.1% 0.06 271.3)
#374591 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) | #1A5094 | 0.037 |
| Deuteranopia (no green cones) | #02488F | 0.041 |
| Tritanopia (no blue cones) | #005764 | 0.109 |
| Achromatopsia (no color) | #4B4B4B | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374591
#374591
oklch(42.2% 0.126 272.1)
- #5E4B00
#5E4B00
oklch(42% 0.086 92.1)
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 #374591, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.025
- Cobalt #1E488F ΔE 0.027
- Dark Slate Blue #483D8B ΔE 0.031
- Dusk Blue #26538D ΔE 0.042
- Light Navy #155084 ΔE 0.049
- Twilight #4E518B ΔE 0.052
- Twilight Blue #0A437A ΔE 0.059
- Sapphire #2138AB ΔE 0.061
Use #374591 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.