#3A5291
Closest named color: Dusk Blue (#26538D). oklch(45.2% 0.107 266.5), rgb(58, 82, 145).
Aa
White text reads best on this color (7.51:1).
About this color
#3A5291 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.107 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.022 away. White text reads best on it, at 7.51:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.79:1 |
| White text | 7.51:1 |
Values
| HEX | #3A5291 |
| RGB | rgb(58, 82, 145) |
| HSL | hsl(223, 43%, 40%) |
| OKLCH | oklch(45.2% 0.107 266.5) |
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 #3A5291 | 7.51:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #3A5291 | 2.79:1 | Fails | Lc 18.1 | Dividers and decoration only |
| #3A5291 text on white | 7.51:1 | AAA | Lc 85.9 | Fine for body text |
| #3A5291 text on black | 2.79:1 | Fails | Lc -16.1 | 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
#CFD9F1
oklch(88.5% 0.035 267.6)
-
Step 300
300
#AEC0EA
oklch(80.8% 0.063 266.8)
-
Step 400
400
#849FE0
oklch(70.8% 0.1 266.6)
-
Step 500
500
#6686D7
oklch(63.2% 0.128 266.5)
-
Step 600
600
#4D6EC4
oklch(55.6% 0.139 266.2)
-
Step 700
700
#3F5BAA
oklch(49.1% 0.13 266.9)
-
Step 800
800 (this color)
#3A5291
oklch(45.2% 0.107 266.5)
-
Step 900
900
#2D3F6E
oklch(37.7% 0.084 266.6)
-
Step 950
950
#1A2540
oklch(26.9% 0.053 266.2)
#3A5291 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) | #365993 | 0.020 |
| Deuteranopia (no green cones) | #2A5190 | 0.018 |
| Tritanopia (no blue cones) | #00606A | 0.095 |
| Achromatopsia (no color) | #555555 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A5291
#3A5291
oklch(45.2% 0.107 266.5)
- #6C5100
#6C5100
oklch(45.1% 0.092 86.3)
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 #3A5291, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.022
- Denim Blue #3B5B92 ΔE 0.026
- Twilight #4E518B ΔE 0.028
- Light Navy Blue #2E5A88 ΔE 0.032
- Dusk #4E5481 ΔE 0.039
- Light Navy #155084 ΔE 0.042
- Dusky Blue #475F94 ΔE 0.043
- Cobalt #1E488F ΔE 0.044
Use #3A5291 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.