#374088
Closest named color: Dark Slate Blue (#483D8B). oklch(40.4% 0.119 274.4), rgb(55, 64, 136).
Aa
White text reads best on this color (9.32:1).
About this color
#374088 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.119 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.027 away. White text reads best on it, at 9.32:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.25:1 |
| White text | 9.32:1 |
Values
| HEX | #374088 |
| RGB | rgb(55, 64, 136) |
| HSL | hsl(233, 42%, 37%) |
| OKLCH | oklch(40.4% 0.119 274.4) |
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 #374088 | 9.32:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #374088 | 2.25:1 | Fails | Lc 12.7 | Not readable |
| #374088 text on white | 9.32:1 | AAA | Lc 91.3 | Preferred for body text |
| #374088 text on black | 2.25:1 | Fails | Lc -11.1 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F8
oklch(93.5% 0.021 274)
-
Step 200
200
#D1D8F3
oklch(88.5% 0.038 274.1)
-
Step 300
300
#B3BEEE
oklch(80.9% 0.069 274.7)
-
Step 400
400
#8C9BE6
oklch(70.8% 0.111 274.6)
-
Step 500
500
#7080DF
oklch(63.1% 0.143 274.4)
-
Step 600
600
#5A68CC
oklch(55.7% 0.154 274.3)
-
Step 700
700
#4A56B1
oklch(49.2% 0.144 274.2)
-
Step 800
800 (this color)
#374088
oklch(40.4% 0.119 274.4)
-
Step 900
900
#333C72
oklch(37.7% 0.092 274)
-
Step 950
950
#1E2343
oklch(26.9% 0.06 275)
#374088 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) | #184A8B | 0.038 |
| Deuteranopia (no green cones) | #074386 | 0.043 |
| Tritanopia (no blue cones) | #00505D | 0.105 |
| Achromatopsia (no color) | #474747 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374088
#374088
oklch(40.4% 0.119 274.4)
- #574800
#574800
oklch(40.5% 0.083 95.4)
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 #374088, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.027
- Cobalt #1E488F ΔE 0.033
- Blueberry #464196 ΔE 0.033
- Twilight Blue #0A437A ΔE 0.050
- Light Navy #155084 ΔE 0.053
- Dusk Blue #26538D ΔE 0.053
- Twilight #4E518B ΔE 0.062
- Deep Sea Blue #015482 ΔE 0.067
Use #374088 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.