#374C82
Closest named color: Dusk Blue (#26538D). oklch(42.7% 0.094 266.5), rgb(55, 76, 130).
Aa
White text reads best on this color (8.33:1).
About this color
#374C82 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.094 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.028 away. White text reads best on it, at 8.33:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.51:1 |
| White text | 8.33:1 |
Values
| HEX | #374C82 |
| RGB | rgb(55, 76, 130) |
| HSL | hsl(223, 41%, 36%) |
| OKLCH | oklch(42.7% 0.094 266.5) |
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 #374C82 | 8.33:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #374C82 | 2.51:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #374C82 text on white | 8.33:1 | AAA | Lc 88.6 | Fine for body text |
| #374C82 text on black | 2.51:1 | Fails | Lc -13.6 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D0D9EE
oklch(88.5% 0.031 267.2)
-
Step 300
300
#B0C0E5
oklch(80.8% 0.055 266.7)
-
Step 400
400
#879FD8
oklch(70.6% 0.088 266.6)
-
Step 500
500
#6A87CD
oklch(63.1% 0.111 266.2)
-
Step 600
600
#526FBA
oklch(55.5% 0.122 266.5)
-
Step 700
700
#435DA1
oklch(49.2% 0.113 266.5)
-
Step 800
800 (this color)
#374C82
oklch(42.7% 0.094 266.5)
-
Step 900
900
#304068
oklch(37.8% 0.072 266.5)
-
Step 950
950
#1C263D
oklch(27.1% 0.045 265.6)
#374C82 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) | #355284 | 0.017 |
| Deuteranopia (no green cones) | #2C4B81 | 0.014 |
| Tritanopia (no blue cones) | #085860 | 0.085 |
| Achromatopsia (no color) | #4E4E4E | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374C82
#374C82
oklch(42.7% 0.094 266.5)
- #644B00
#644B00
oklch(42.8% 0.087 86.6)
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 #374C82, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.028
- Light Navy #155084 ΔE 0.031
- Cobalt #1E488F ΔE 0.037
- Twilight #4E518B ΔE 0.040
- Light Navy Blue #2E5A88 ΔE 0.040
- Deep Sea Blue #015482 ΔE 0.041
- Dusk #4E5481 ΔE 0.043
- Denim Blue #3B5B92 ΔE 0.048
Use #374C82 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.