#374B7D
Closest named color: Light Navy (#155084). oklch(42.1% 0.087 266.3), rgb(55, 75, 125).
Aa
White text reads best on this color (8.51:1).
About this color
#374B7D is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.087 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.032 away. White text reads best on it, at 8.51:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.46:1 |
| White text | 8.51:1 |
Values
| HEX | #374B7D |
| RGB | rgb(55, 75, 125) |
| HSL | hsl(223, 39%, 35%) |
| OKLCH | oklch(42.1% 0.087 266.3) |
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 #374B7D | 8.51:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #374B7D | 2.46:1 | Fails | Lc 14.8 | Not readable |
| #374B7D text on white | 8.51:1 | AAA | Lc 89.2 | Fine for body text |
| #374B7D text on black | 2.46:1 | Fails | Lc -13.0 | 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
#D0D9ED
oklch(88.5% 0.029 266.4)
-
Step 300
300
#B1C1E3
oklch(81% 0.051 265.3)
-
Step 400
400
#89A0D4
oklch(70.8% 0.081 265.9)
-
Step 500
500
#6C87C9
oklch(63% 0.105 266.5)
-
Step 600
600
#5470B6
oklch(55.6% 0.114 266.3)
-
Step 700
700
#455E9C
oklch(49.2% 0.104 266.1)
-
Step 800
800 (this color)
#374B7D
oklch(42.1% 0.087 266.3)
-
Step 900
900
#314066
oklch(37.7% 0.068 266.8)
-
Step 950
950
#1D263C
oklch(27.1% 0.043 266.6)
#374B7D 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) | #37507F | 0.015 |
| Deuteranopia (no green cones) | #2E4A7C | 0.012 |
| Tritanopia (no blue cones) | #12565E | 0.078 |
| Achromatopsia (no color) | #4D4D4D | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374B7D
#374B7D
oklch(42.1% 0.087 266.3)
- #624900
#624900
oklch(42.1% 0.086 86)
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 #374B7D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.032
- Dusk Blue #26538D ΔE 0.034
- Cobalt #1E488F ΔE 0.042
- Deep Sea Blue #015482 ΔE 0.042
- Light Navy Blue #2E5A88 ΔE 0.044
- Dusk #4E5481 ΔE 0.045
- Twilight #4E518B ΔE 0.045
- Twilight Blue #0A437A ΔE 0.051
Use #374B7D 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.