#374686
Closest named color: Cobalt (#1E488F). oklch(41.6% 0.108 271.1), rgb(55, 70, 134).
Aa
White text reads best on this color (8.81:1).
About this color
#374686 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.108 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.029 away. White text reads best on it, at 8.81:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.38:1 |
| White text | 8.81:1 |
Values
| HEX | #374686 |
| RGB | rgb(55, 70, 134) |
| HSL | hsl(229, 42%, 37%) |
| OKLCH | oklch(41.6% 0.108 271.1) |
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 #374686 | 8.81:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #374686 | 2.38:1 | Fails | Lc 14.0 | Not readable |
| #374686 text on white | 8.81:1 | AAA | Lc 90.0 | Fine for body text |
| #374686 text on black | 2.38:1 | Fails | Lc -12.3 | 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
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D0D8F1
oklch(88.4% 0.035 271.5)
-
Step 300
300
#B1BFEA
oklch(80.8% 0.063 270.8)
-
Step 400
400
#899DE0
oklch(70.7% 0.101 270.9)
-
Step 500
500
#6D83D7
oklch(63% 0.129 271.2)
-
Step 600
600
#566BC5
oklch(55.6% 0.141 271.3)
-
Step 700
700
#4659AA
oklch(49.1% 0.131 271)
-
Step 800
800 (this color)
#374686
oklch(41.6% 0.108 271.1)
-
Step 900
900
#313E6E
oklch(37.7% 0.084 270.5)
-
Step 950
950
#1D2440
oklch(26.9% 0.053 271.8)
#374686 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) | #284E88 | 0.026 |
| Deuteranopia (no green cones) | #1D4785 | 0.028 |
| Tritanopia (no blue cones) | #02545F | 0.096 |
| Achromatopsia (no color) | #4A4A4A | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374686
#374686
oklch(41.6% 0.108 271.1)
- #5D4900
#5D4900
oklch(41.5% 0.085 90.7)
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 #374686, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.029
- Dark Slate Blue #483D8B ΔE 0.035
- Blueberry #464196 ΔE 0.037
- Dusk Blue #26538D ΔE 0.038
- Light Navy #155084 ΔE 0.040
- Twilight #4E518B ΔE 0.049
- Twilight Blue #0A437A ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.053
Use #374686 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.