#3951A0
Closest named color: Dusk Blue (#26538D). oklch(45.9% 0.131 268.2), rgb(57, 81, 160).
Aa
White text reads best on this color (7.34:1).
About this color
#3951A0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.131 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.039 away. White text reads best on it, at 7.34:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.85:1 |
| White text | 7.34:1 |
Values
| HEX | #3951A0 |
| RGB | rgb(57, 81, 160) |
| HSL | hsl(226, 47%, 43%) |
| OKLCH | oklch(45.9% 0.131 268.2) |
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 #3951A0 | 7.34:1 | AAA | Lc -90.1 | Preferred for body text |
| Black text on #3951A0 | 2.85:1 | Fails | Lc 18.8 | Dividers and decoration only |
| #3951A0 text on white | 7.34:1 | AAA | Lc 85.3 | Fine for body text |
| #3951A0 text on black | 2.85:1 | Fails | Lc -16.8 | 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
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CFD9F1
oklch(88.5% 0.035 267.6)
-
Step 300
300
#AFC0EB
oklch(80.9% 0.064 268.1)
-
Step 400
400
#869EE0
oklch(70.7% 0.101 268.5)
-
Step 500
500
#6885D8
oklch(63.2% 0.13 268)
-
Step 600
600
#506DC5
oklch(55.6% 0.14 267.9)
-
Step 700
700 (this color)
#3951A0
oklch(45.9% 0.131 268.2)
-
Step 800
800
#364A8A
oklch(42.7% 0.109 268.5)
-
Step 900
900
#2E3E6E
oklch(37.5% 0.085 268.2)
-
Step 950
950
#1B2541
oklch(27% 0.054 267.8)
#3951A0 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) | #285BA3 | 0.029 |
| Deuteranopia (no green cones) | #11529E | 0.033 |
| Tritanopia (no blue cones) | #006371 | 0.110 |
| Achromatopsia (no color) | #565656 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3951A0
#3951A0
oklch(45.9% 0.131 268.2)
- #6D5400
#6D5400
oklch(45.9% 0.094 88.6)
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 #3951A0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.040
- Twilight #4E518B ΔE 0.044
- Blueberry #464196 ΔE 0.044
- Cobalt #1E488F ΔE 0.049
- Light Navy Blue #2E5A88 ΔE 0.052
- Dusky Blue #475F94 ΔE 0.052
- Light Navy #155084 ΔE 0.059
Use #3951A0 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.