#375391
Closest named color: Dusk Blue (#26538D). oklch(45.2% 0.107 264.2), rgb(55, 83, 145).
Aa
White text reads best on this color (7.47:1).
About this color
#375391 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.107 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.019 away. White text reads best on it, at 7.47:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.80:1 |
| White text | 7.47:1 |
Values
| HEX | #375391 |
| RGB | rgb(55, 83, 145) |
| HSL | hsl(221, 45%, 39%) |
| OKLCH | oklch(45.2% 0.107 264.2) |
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 #375391 | 7.47:1 | AAA | Lc -90.6 | Preferred for body text |
| Black text on #375391 | 2.80:1 | Fails | Lc 18.2 | Dividers and decoration only |
| #375391 text on white | 7.47:1 | AAA | Lc 85.8 | Fine for body text |
| #375391 text on black | 2.80:1 | Fails | Lc -16.3 | Dividers and decoration only |
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
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CED9F1
oklch(88.4% 0.035 266)
-
Step 300
300
#ACC1EA
oklch(80.9% 0.063 263.7)
-
Step 400
400
#81A0E0
oklch(70.8% 0.1 264.1)
-
Step 500
500
#6287D7
oklch(63.2% 0.128 264.3)
-
Step 600
600
#496FC4
oklch(55.6% 0.139 264.2)
-
Step 700
700
#3A5CA9
oklch(49% 0.129 264.3)
-
Step 800
800 (this color)
#375391
oklch(45.2% 0.107 264.2)
-
Step 900
900
#2B406E
oklch(37.8% 0.083 264.3)
-
Step 950
950
#192640
oklch(27.1% 0.052 263.2)
#375391 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) | #375993 | 0.017 |
| Deuteranopia (no green cones) | #2B5190 | 0.015 |
| Tritanopia (no blue cones) | #00616B | 0.092 |
| Achromatopsia (no color) | #555555 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375391
#375391
oklch(45.2% 0.107 264.2)
- #6E5100
#6E5100
oklch(45.3% 0.093 84.6)
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 #375391, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.019
- Denim Blue #3B5B92 ΔE 0.024
- Light Navy Blue #2E5A88 ΔE 0.029
- Twilight #4E518B ΔE 0.031
- Light Navy #155084 ΔE 0.040
- Dusk #4E5481 ΔE 0.040
- Dusky Blue #475F94 ΔE 0.042
- Cobalt #1E488F ΔE 0.044
Use #375391 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.