#374479
Closest named color: Twilight Blue (#0A437A). oklch(40.3% 0.091 271.4), rgb(55, 68, 121).
Aa
White text reads best on this color (9.26:1).
About this color
#374479 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.091 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 9.26:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.26:1 |
| White text | 9.26:1 |
Values
| HEX | #374479 |
| RGB | rgb(55, 68, 121) |
| HSL | hsl(228, 37%, 35%) |
| OKLCH | oklch(40.3% 0.091 271.4) |
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 #374479 | 9.26:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #374479 | 2.26:1 | Fails | Lc 12.7 | Not readable |
| #374479 text on white | 9.26:1 | AAA | Lc 91.3 | Preferred for body text |
| #374479 text on black | 2.26:1 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6EAF4
oklch(93.7% 0.014 268.5)
-
Step 200
200
#D2D9ED
oklch(88.6% 0.029 270.4)
-
Step 300
300
#B4BFE4
oklch(80.8% 0.054 272.1)
-
Step 400
400
#8D9ED6
oklch(70.7% 0.085 271.1)
-
Step 500
500
#7285CB
oklch(63.1% 0.108 271.5)
-
Step 600
600
#5B6EB8
oklch(55.7% 0.117 271.3)
-
Step 700
700
#4B5B9E
oklch(49.1% 0.109 271.7)
-
Step 800
800 (this color)
#374479
oklch(40.3% 0.091 271.4)
-
Step 900
900
#343F67
oklch(37.8% 0.07 271.1)
-
Step 950
950
#1E253C
oklch(27% 0.044 270.3)
#374479 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) | #2E4A7B | 0.019 |
| Deuteranopia (no green cones) | #274478 | 0.020 |
| Tritanopia (no blue cones) | #184F58 | 0.081 |
| Achromatopsia (no color) | #474747 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374479
#374479
oklch(40.3% 0.091 271.4)
- #594600
#594600
oklch(40.3% 0.082 91)
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 #374479, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.043
- Cobalt #1E488F ΔE 0.043
- Light Navy #155084 ΔE 0.044
- Dark Slate Blue #483D8B ΔE 0.045
- Dusk Blue #26538D ΔE 0.050
- Blueberry #464196 ΔE 0.055
- Deep Sea Blue #015482 ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.058
Use #374479 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.