#374473
Closest named color: Twilight Blue (#0A437A). oklch(39.9% 0.081 270.7), rgb(55, 68, 115).
Aa
White text reads best on this color (9.38:1).
About this color
#374473 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.081 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.044 away. White text reads best on it, at 9.38:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.23:1 |
| White text | 9.38:1 |
Values
| HEX | #374473 |
| RGB | rgb(55, 68, 115) |
| HSL | hsl(227, 35%, 33%) |
| OKLCH | oklch(39.9% 0.081 270.7) |
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 #374473 | 9.38:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #374473 | 2.23:1 | Fails | Lc 12.4 | Not readable |
| #374473 text on white | 9.38:1 | AAA | Lc 91.6 | Preferred for body text |
| #374473 text on black | 2.23:1 | 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
#D0D9F0
oklch(88.6% 0.033 268.7)
-
Step 300
300
#B2BFE9
oklch(80.9% 0.061 271.5)
-
Step 400
400
#8A9DDE
oklch(70.7% 0.098 271.2)
-
Step 500
500
#6D84D5
oklch(63.1% 0.125 270.5)
-
Step 600
600
#566CC2
oklch(55.6% 0.136 270.7)
-
Step 700
700
#475AA7
oklch(49.1% 0.125 270.8)
-
Step 800
800
#3A4A88
oklch(42.8% 0.104 270.6)
-
Step 900
900 (this color)
#374473
oklch(39.9% 0.081 270.7)
-
Step 950
950
#1D2540
oklch(27.1% 0.052 270.2)
#374473 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) | #324975 | 0.015 |
| Deuteranopia (no green cones) | #2C4472 | 0.015 |
| Tritanopia (no blue cones) | #1E4E56 | 0.072 |
| Achromatopsia (no color) | #464646 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374473
#374473
oklch(39.9% 0.081 270.7)
- #584501
#584501
oklch(39.9% 0.081 90.6)
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 #374473, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.044
- Light Navy #155084 ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.048
- Cobalt #1E488F ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.054
- Dusk Blue #26538D ΔE 0.056
- Deep Sea Blue #015482 ΔE 0.057
- Dusk #4E5481 ΔE 0.063
Use #374473 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.