#374474
Closest named color: Twilight Blue (#0A437A). oklch(39.9% 0.083 270.8), rgb(55, 68, 116).
Aa
White text reads best on this color (9.36:1).
About this color
#374474 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.083 and its hue 271°. 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 9.36:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.24:1 |
| White text | 9.36:1 |
Values
| HEX | #374474 |
| RGB | rgb(55, 68, 116) |
| HSL | hsl(227, 36%, 34%) |
| OKLCH | oklch(39.9% 0.083 270.8) |
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 #374474 | 9.36:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #374474 | 2.24:1 | Fails | Lc 12.4 | Not readable |
| #374474 text on white | 9.36:1 | AAA | Lc 91.5 | Preferred for body text |
| #374474 text on black | 2.24:1 | Fails | Lc -10.8 | 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 900.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D0D9F1
oklch(88.6% 0.034 269.3)
-
Step 300
300
#B1BFEA
oklch(80.8% 0.063 270.8)
-
Step 400
400
#899DDF
oklch(70.6% 0.1 270.8)
-
Step 500
500
#6D84D6
oklch(63.2% 0.126 270.6)
-
Step 600
600
#566CC3
oklch(55.6% 0.137 270.7)
-
Step 700
700
#4659A9
oklch(49% 0.129 270.9)
-
Step 800
800
#3A4989
oklch(42.6% 0.107 271.3)
-
Step 900
900 (this color)
#374474
oklch(39.9% 0.083 270.8)
-
Step 950
950
#1D2540
oklch(27.1% 0.052 270.2)
#374474 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) | #314976 | 0.015 |
| Deuteranopia (no green cones) | #2B4473 | 0.016 |
| Tritanopia (no blue cones) | #1D4E56 | 0.074 |
| Achromatopsia (no color) | #464646 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374474
#374474
oklch(39.9% 0.083 270.8)
- #584500
#584500
oklch(39.9% 0.082 90.8)
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 #374474, 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 0.047
- Dark Grey Blue #29465B ΔE 0.050
- Cobalt #1E488F ΔE 0.050
- Dark Slate Blue #483D8B ΔE 0.052
- Dusk Blue #26538D ΔE 0.055
- Deep Sea Blue #015482 ΔE 0.057
- Dusk #4E5481 ΔE 0.063
Use #374474 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.