#374681
Closest named color: Cobalt (#1E488F). oklch(41.2% 0.1 270.7), rgb(55, 70, 129).
Aa
White text reads best on this color (8.91:1).
About this color
#374681 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.100 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.034 away. White text reads best on it, at 8.91:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.35:1 |
| White text | 8.91:1 |
Values
| HEX | #374681 |
| RGB | rgb(55, 70, 129) |
| HSL | hsl(228, 40%, 36%) |
| OKLCH | oklch(41.2% 0.1 270.7) |
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 #374681 | 8.91:1 | AAA | Lc -94.7 | Preferred for body text |
| Black text on #374681 | 2.35:1 | Fails | Lc 13.7 | Not readable |
| #374681 text on white | 8.91:1 | AAA | Lc 90.3 | Preferred for body text |
| #374681 text on black | 2.35:1 | Fails | Lc -12.0 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D1D9EF
oklch(88.6% 0.031 269.8)
-
Step 300
300
#B2BFE7
oklch(80.8% 0.058 270.9)
-
Step 400
400
#8B9EDC
oklch(70.8% 0.094 270.8)
-
Step 500
500
#6E84D2
oklch(63% 0.12 270.7)
-
Step 600
600
#576DBF
oklch(55.7% 0.13 270.4)
-
Step 700
700
#485AA5
oklch(49.1% 0.122 271.2)
-
Step 800
800 (this color)
#374681
oklch(41.2% 0.1 270.7)
-
Step 900
900
#323E6B
oklch(37.6% 0.079 270.9)
-
Step 950
950
#1D253F
oklch(27.1% 0.05 269.9)
#374681 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) | #2C4D83 | 0.022 |
| Deuteranopia (no green cones) | #234780 | 0.023 |
| Tritanopia (no blue cones) | #0D535D | 0.089 |
| Achromatopsia (no color) | #4A4A4A | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374681
#374681
oklch(41.2% 0.1 270.7)
- #5C4800
#5C4800
oklch(41.1% 0.084 90.5)
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 #374681, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.034
- Dark Slate Blue #483D8B ΔE 0.039
- Light Navy #155084 ΔE 0.039
- Dusk Blue #26538D ΔE 0.040
- Blueberry #464196 ΔE 0.044
- Twilight Blue #0A437A ΔE 0.046
- Twilight #4E518B ΔE 0.050
- Deep Sea Blue #015482 ΔE 0.052
Use #374681 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.