#374374
Closest named color: Twilight Blue (#0A437A). oklch(39.7% 0.084 271.7), rgb(55, 67, 116).
Aa
White text reads best on this color (9.47:1).
About this color
#374374 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.084 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.043 away. White text reads best on it, at 9.47:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.21:1 |
| White text | 9.47:1 |
Values
| HEX | #374374 |
| RGB | rgb(55, 67, 116) |
| HSL | hsl(228, 36%, 34%) |
| OKLCH | oklch(39.7% 0.084 271.7) |
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 #374374 | 9.47:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #374374 | 2.21:1 | Fails | Lc 12.2 | Not readable |
| #374374 text on white | 9.47:1 | AAA | Lc 91.8 | Preferred for body text |
| #374374 text on black | 2.21:1 | Fails | Lc -10.6 | 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 900.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D1D8F1
oklch(88.5% 0.035 273.2)
-
Step 300
300
#B2BFEA
oklch(80.9% 0.063 271.8)
-
Step 400
400
#8A9DE0
oklch(70.7% 0.101 271.5)
-
Step 500
500
#6E83D7
oklch(63.1% 0.129 271.7)
-
Step 600
600
#576BC5
oklch(55.6% 0.141 271.7)
-
Step 700
700
#4759AA
oklch(49.1% 0.131 271.4)
-
Step 800
800
#3B498A
oklch(42.8% 0.108 271.9)
-
Step 900
900 (this color)
#374374
oklch(39.7% 0.084 271.7)
-
Step 950
950
#1D2440
oklch(26.9% 0.053 271.8)
#374374 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) | #304976 | 0.018 |
| Deuteranopia (no green cones) | #294373 | 0.018 |
| Tritanopia (no blue cones) | #1D4D56 | 0.074 |
| Achromatopsia (no color) | #464646 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374374
#374374
oklch(39.7% 0.084 271.7)
- #574500
#574500
oklch(39.8% 0.081 91.8)
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 #374374, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.043
- Light Navy #155084 ΔE 0.048
- Cobalt #1E488F ΔE 0.050
- Dark Grey Blue #29465B ΔE 0.051
- Dark Slate Blue #483D8B ΔE 0.051
- Dusk Blue #26538D ΔE 0.057
- Deep Sea Blue #015482 ΔE 0.059
- Blueberry #464196 ΔE 0.063
Use #374374 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.