#3A57A3
Closest named color: Denim Blue (#3B5B92). oklch(47.5% 0.127 266), rgb(58, 87, 163).
Aa
White text reads best on this color (6.83:1).
About this color
#3A57A3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.127 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.032 away. White text reads best on it, at 6.83:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.07:1 |
| White text | 6.83:1 |
Values
| HEX | #3A57A3 |
| RGB | rgb(58, 87, 163) |
| HSL | hsl(223, 48%, 43%) |
| OKLCH | oklch(47.5% 0.127 266) |
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 #3A57A3 | 6.83:1 | AA | Lc -88.4 | Fine for body text |
| Black text on #3A57A3 | 3.07:1 | AA large text | Lc 20.7 | Dividers and decoration only |
| #3A57A3 text on white | 6.83:1 | AA | Lc 83.4 | Fine for body text |
| #3A57A3 text on black | 3.07:1 | AA large text | Lc -18.6 | 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 700.
-
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
#AEC0E9
oklch(80.8% 0.061 266.4)
-
Step 400
400
#849FDF
oklch(70.7% 0.099 266.4)
-
Step 500
500
#6586D6
oklch(63.1% 0.127 265.9)
-
Step 600
600
#4D6EC3
oklch(55.5% 0.137 266.1)
-
Step 700
700 (this color)
#3A57A3
oklch(47.5% 0.127 266)
-
Step 800
800
#334B88
oklch(42.6% 0.105 265.9)
-
Step 900
900
#2D3F6D
oklch(37.6% 0.082 266.4)
-
Step 950
950
#1A2540
oklch(26.9% 0.053 266.2)
#3A57A3 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) | #3260A6 | 0.025 |
| Deuteranopia (no green cones) | #2056A1 | 0.025 |
| Tritanopia (no blue cones) | #006875 | 0.106 |
| Achromatopsia (no color) | #5B5B5B | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A57A3
#3A57A3
oklch(47.5% 0.127 266)
- #745700
#745700
oklch(47.4% 0.097 86.1)
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 #3A57A3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.032
- Dusky Blue #475F94 ΔE 0.040
- Dusk Blue #26538D ΔE 0.044
- Twilight #4E518B ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.049
- Mid Blue #276AB3 ΔE 0.054
- Denim #3B638C ΔE 0.056
- French Blue #436BAD ΔE 0.058
Use #3A57A3 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.