#3A5199
Closest named color: Dusk Blue (#26538D). oklch(45.5% 0.12 268.1), rgb(58, 81, 153).
Aa
White text reads best on this color (7.45:1).
About this color
#3A5199 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.120 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.030 away. White text reads best on it, at 7.45:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.81:1 |
| White text | 7.45:1 |
Values
| HEX | #3A5199 |
| RGB | rgb(58, 81, 153) |
| HSL | hsl(225, 45%, 41%) |
| OKLCH | oklch(45.5% 0.12 268.1) |
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 #3A5199 | 7.45:1 | AAA | Lc -90.5 | Preferred for body text |
| Black text on #3A5199 | 2.81:1 | Fails | Lc 18.3 | Dividers and decoration only |
| #3A5199 text on white | 7.45:1 | AAA | Lc 85.7 | Fine for body text |
| #3A5199 text on black | 2.81:1 | Fails | Lc -16.4 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CED9F4
oklch(88.5% 0.039 267.9)
-
Step 300
300
#ADC0EF
oklch(81% 0.07 267.6)
-
Step 400
400
#829EE7
oklch(70.8% 0.112 267.5)
-
Step 500
500
#6484E0
oklch(63.2% 0.143 267.7)
-
Step 600
600
#4C6BCE
oklch(55.6% 0.157 268)
-
Step 700
700
#3E59B2
oklch(49.2% 0.145 268)
-
Step 800
800 (this color)
#3A5199
oklch(45.5% 0.12 268.1)
-
Step 900
900
#2C3E73
oklch(37.7% 0.093 267.7)
-
Step 950
950
#1A2443
oklch(26.9% 0.06 268.7)
#3A5199 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) | #2E5A9C | 0.026 |
| Deuteranopia (no green cones) | #1F5197 | 0.027 |
| Tritanopia (no blue cones) | #00616D | 0.104 |
| Achromatopsia (no color) | #555555 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A5199
#3A5199
oklch(45.5% 0.12 268.1)
- #6C5300
#6C5300
oklch(45.5% 0.093 88.4)
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 #3A5199, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.030
- Denim Blue #3B5B92 ΔE 0.033
- Twilight #4E518B ΔE 0.035
- Blueberry #464196 ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.043
- Cobalt #1E488F ΔE 0.045
- Dusky Blue #475F94 ΔE 0.047
- Dusk #4E5481 ΔE 0.050
Use #3A5199 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.