#374075
Closest named color: Twilight Blue (#0A437A). oklch(39.1% 0.09 274.2), rgb(55, 64, 117).
Aa
White text reads best on this color (9.75:1).
About this color
#374075 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.090 and its hue 274°. 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 9.75:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.15:1 |
| White text | 9.75:1 |
Values
| HEX | #374075 |
| RGB | rgb(55, 64, 117) |
| HSL | hsl(231, 36%, 34%) |
| OKLCH | oklch(39.1% 0.09 274.2) |
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 #374075 | 9.75:1 | AAA | Lc -96.7 | Preferred for body text |
| Black text on #374075 | 2.15:1 | Fails | Lc 11.5 | Not readable |
| #374075 text on white | 9.75:1 | AAA | Lc 92.5 | Preferred for body text |
| #374075 text on black | 2.15:1 | Fails | Lc -9.9 | 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
#D1D8F3
oklch(88.5% 0.038 274.1)
-
Step 300
300
#B3BEED
oklch(80.9% 0.068 274.5)
-
Step 400
400
#8C9BE4
oklch(70.7% 0.108 274.4)
-
Step 500
500
#7181DC
oklch(63.2% 0.138 274.3)
-
Step 600
600
#5A68CA
oklch(55.5% 0.151 274.3)
-
Step 700
700
#4A56AE
oklch(49% 0.139 274.2)
-
Step 800
800
#3D478D
oklch(42.7% 0.115 274.4)
-
Step 900
900 (this color)
#374075
oklch(39.1% 0.09 274.2)
-
Step 950
950
#1E2442
oklch(27.1% 0.056 273.5)
#374075 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) | #2A4777 | 0.024 |
| Deuteranopia (no green cones) | #244174 | 0.024 |
| Tritanopia (no blue cones) | #1D4B54 | 0.080 |
| Achromatopsia (no color) | #444444 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374075
#374075
oklch(39.1% 0.09 274.2)
- #534400
#534400
oklch(39.1% 0.08 94.6)
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 #374075, 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 0.047
- Cobalt #1E488F ΔE 0.051
- Light Navy #155084 ΔE 0.054
- Dark Grey Blue #29465B ΔE 0.056
- Blueberry #464196 ΔE 0.060
- Dusk Blue #26538D ΔE 0.062
- Marine Blue #01386A ΔE 0.064
Use #374075 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.