#3A4E8B
Closest named color: Dusk Blue (#26538D). oklch(43.9% 0.104 268.3), rgb(58, 78, 139).
Aa
White text reads best on this color (7.94:1).
About this color
#3A4E8B is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.104 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.023 away. White text reads best on it, at 7.94:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.64:1 |
| White text | 7.94:1 |
Values
| HEX | #3A4E8B |
| RGB | rgb(58, 78, 139) |
| HSL | hsl(225, 41%, 39%) |
| OKLCH | oklch(43.9% 0.104 268.3) |
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 #3A4E8B | 7.94:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #3A4E8B | 2.64:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #3A4E8B text on white | 7.94:1 | AAA | Lc 87.4 | Fine for body text |
| #3A4E8B text on black | 2.64:1 | Fails | Lc -14.7 | 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 800.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D0D9F0
oklch(88.6% 0.033 268.7)
-
Step 300
300
#B0C0E9
oklch(80.9% 0.061 268.3)
-
Step 400
400
#879EDE
oklch(70.7% 0.098 268.7)
-
Step 500
500
#6A85D4
oklch(63.1% 0.123 268.4)
-
Step 600
600
#526DC2
oklch(55.5% 0.136 268.5)
-
Step 700
700
#435BA7
oklch(49.1% 0.125 268.4)
-
Step 800
800 (this color)
#3A4E8B
oklch(43.9% 0.104 268.3)
-
Step 900
900
#2F3F6C
oklch(37.7% 0.08 267.7)
-
Step 950
950
#1C253F
oklch(27% 0.05 268.4)
#3A4E8B 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) | #34558D | 0.020 |
| Deuteranopia (no green cones) | #294E8A | 0.019 |
| Tritanopia (no blue cones) | #045B65 | 0.093 |
| Achromatopsia (no color) | #515151 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A4E8B
#3A4E8B
oklch(43.9% 0.104 268.3)
- #674F00
#674F00
oklch(44% 0.09 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 #3A4E8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.023
- Twilight #4E518B ΔE 0.030
- Light Navy Blue #2E5A88 ΔE 0.037
- Light Navy #155084 ΔE 0.037
- Denim Blue #3B5B92 ΔE 0.038
- Cobalt #1E488F ΔE 0.038
- Dusk #4E5481 ΔE 0.040
- Blueberry #464196 ΔE 0.043
Use #3A4E8B 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.