#374274
Closest named color: Twilight Blue (#0A437A). oklch(39.5% 0.086 272.6), rgb(55, 66, 116).
Aa
White text reads best on this color (9.57:1).
About this color
#374274 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.086 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.043 away. White text reads best on it, at 9.57:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.19:1 |
| White text | 9.57:1 |
Values
| HEX | #374274 |
| RGB | rgb(55, 66, 116) |
| HSL | hsl(229, 36%, 34%) |
| OKLCH | oklch(39.5% 0.086 272.6) |
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 #374274 | 9.57:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #374274 | 2.19:1 | Fails | Lc 11.9 | Not readable |
| #374274 text on white | 9.57:1 | AAA | Lc 92.0 | Preferred for body text |
| #374274 text on black | 2.19:1 | Fails | Lc -10.4 | 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 900.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D1D8F1
oklch(88.5% 0.035 273.2)
-
Step 300
300
#B2BFEB
oklch(81% 0.064 272)
-
Step 400
400
#8B9CE1
oklch(70.7% 0.103 272.9)
-
Step 500
500
#6F82D8
oklch(63% 0.131 272.7)
-
Step 600
600
#586AC6
oklch(55.6% 0.143 272.6)
-
Step 700
700
#4858AB
oklch(49.1% 0.133 272.4)
-
Step 800
800
#3B488A
oklch(42.6% 0.11 272.5)
-
Step 900
900 (this color)
#374274
oklch(39.5% 0.086 272.6)
-
Step 950
950
#1E2441
oklch(27% 0.055 273.4)
#374274 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) | #2E4876 | 0.019 |
| Deuteranopia (no green cones) | #284373 | 0.019 |
| Tritanopia (no blue cones) | #1D4D55 | 0.077 |
| Achromatopsia (no color) | #454545 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374274
#374274
oklch(39.5% 0.086 272.6)
- #564400
#564400
oklch(39.4% 0.081 91.6)
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 #374274, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.043
- Dark Slate Blue #483D8B ΔE 0.050
- Light Navy #155084 ΔE 0.050
- Cobalt #1E488F ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.052
- Dusk Blue #26538D ΔE 0.059
- Deep Sea Blue #015482 ΔE 0.061
- Blueberry #464196 ΔE 0.062
Use #374274 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.