#374174
Closest named color: Twilight Blue (#0A437A). oklch(39.3% 0.087 273.4), rgb(55, 65, 116).
Aa
White text reads best on this color (9.67:1).
About this color
#374174 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.087 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.042 away. White text reads best on it, at 9.67:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.17:1 |
| White text | 9.67:1 |
Values
| HEX | #374174 |
| RGB | rgb(55, 65, 116) |
| HSL | hsl(230, 36%, 34%) |
| OKLCH | oklch(39.3% 0.087 273.4) |
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 #374174 | 9.67:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #374174 | 2.17:1 | Fails | Lc 11.7 | Not readable |
| #374174 text on white | 9.67:1 | AAA | Lc 92.3 | Preferred for body text |
| #374174 text on black | 2.17:1 | Fails | Lc -10.1 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D1D8F2
oklch(88.5% 0.037 273.7)
-
Step 300
300
#B3BEEC
oklch(80.9% 0.066 274.3)
-
Step 400
400
#8B9CE2
oklch(70.7% 0.105 273)
-
Step 500
500
#7082DA
oklch(63.2% 0.134 273.3)
-
Step 600
600
#5969C7
oklch(55.5% 0.146 273.5)
-
Step 700
700
#4957AC
oklch(49% 0.135 273.3)
-
Step 800
800
#3C488B
oklch(42.7% 0.111 273.2)
-
Step 900
900 (this color)
#374174
oklch(39.3% 0.087 273.4)
-
Step 950
950
#1E2441
oklch(27% 0.055 273.4)
#374174 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) | #2C4776 | 0.021 |
| Deuteranopia (no green cones) | #264273 | 0.022 |
| Tritanopia (no blue cones) | #1E4C55 | 0.077 |
| Achromatopsia (no color) | #444444 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374174
#374174
oklch(39.3% 0.087 273.4)
- #544400
#544400
oklch(39.2% 0.08 93.6)
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 #374174, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.042
- Dark Slate Blue #483D8B ΔE 0.049
- Cobalt #1E488F ΔE 0.051
- Light Navy #155084 ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.053
- Dusk Blue #26538D ΔE 0.061
- Blueberry #464196 ΔE 0.062
- Deep Sea Blue #015482 ΔE 0.063
Use #374174 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.