#374A79
Closest named color: Light Navy (#155084). oklch(41.6% 0.082 266.2), rgb(55, 74, 121).
Aa
White text reads best on this color (8.68:1).
About this color
#374A79 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.082 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.035 away. White text reads best on it, at 8.68:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.41:1 |
| White text | 8.68:1 |
Values
| HEX | #374A79 |
| RGB | rgb(55, 74, 121) |
| HSL | hsl(223, 37%, 35%) |
| OKLCH | oklch(41.6% 0.082 266.2) |
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 #374A79 | 8.68:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #374A79 | 2.41:1 | Fails | Lc 14.3 | Not readable |
| #374A79 text on white | 8.68:1 | AAA | Lc 89.7 | Fine for body text |
| #374A79 text on black | 2.41:1 | Fails | Lc -12.6 | 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 800.
-
Step 50
50
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#D1D9EB
oklch(88.5% 0.026 266.6)
-
Step 300
300
#B2C1E1
oklch(81% 0.048 265.4)
-
Step 400
400
#8AA0D2
oklch(70.7% 0.078 266)
-
Step 500
500
#6E88C6
oklch(63.2% 0.099 266.3)
-
Step 600
600
#5671B2
oklch(55.7% 0.106 266)
-
Step 700
700
#465E99
oklch(49.1% 0.099 266.1)
-
Step 800
800 (this color)
#374A79
oklch(41.6% 0.082 266.2)
-
Step 900
900
#324064
oklch(37.7% 0.065 267.1)
-
Step 950
950
#1D263A
oklch(27% 0.04 265.3)
#374A79 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) | #374F7B | 0.015 |
| Deuteranopia (no green cones) | #304978 | 0.010 |
| Tritanopia (no blue cones) | #17545B | 0.074 |
| Achromatopsia (no color) | #4B4B4B | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374A79
#374A79
oklch(41.6% 0.082 266.2)
- #604806
#604806
oklch(41.6% 0.082 85.8)
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 #374A79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.035
- Dusk Blue #26538D ΔE 0.039
- Deep Sea Blue #015482 ΔE 0.044
- Cobalt #1E488F ΔE 0.046
- Dusk #4E5481 ΔE 0.048
- Light Navy Blue #2E5A88 ΔE 0.048
- Twilight Blue #0A437A ΔE 0.049
- Twilight #4E518B ΔE 0.049
Use #374A79 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.