#3D4F99
Closest named color: Twilight (#4E518B). oklch(45.2% 0.122 270.6), rgb(61, 79, 153).
Aa
White text reads best on this color (7.56:1).
About this color
#3D4F99 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.122 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.034 away. White text reads best on it, at 7.56:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.77:1 |
| White text | 7.56:1 |
Values
| HEX | #3D4F99 |
| RGB | rgb(61, 79, 153) |
| HSL | hsl(228, 43%, 42%) |
| OKLCH | oklch(45.2% 0.122 270.6) |
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 #3D4F99 | 7.56:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #3D4F99 | 2.77:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #3D4F99 text on white | 7.56:1 | AAA | Lc 86.1 | Fine for body text |
| #3D4F99 text on black | 2.77:1 | Fails | Lc -16.0 | 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
#CFD8F4
oklch(88.4% 0.04 271.4)
-
Step 300
300
#AFBFF0
oklch(80.9% 0.072 270.6)
-
Step 400
400
#869CE8
oklch(70.7% 0.114 270.9)
-
Step 500
500
#6982E1
oklch(63.1% 0.146 270.7)
-
Step 600
600
#5169CF
oklch(55.5% 0.159 270.5)
-
Step 700
700
#4257B3
oklch(49% 0.148 270.4)
-
Step 800
800 (this color)
#3D4F99
oklch(45.2% 0.122 270.6)
-
Step 900
900
#2F3D74
oklch(37.8% 0.095 270.5)
-
Step 950
950
#1B2444
oklch(27% 0.061 270.1)
#3D4F99 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) | #2B589C | 0.028 |
| Deuteranopia (no green cones) | #1C5097 | 0.033 |
| Tritanopia (no blue cones) | #00606C | 0.108 |
| Achromatopsia (no color) | #545454 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D4F99
#3D4F99
oklch(45.2% 0.122 270.6)
- #695300
#695300
oklch(45.2% 0.092 91)
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 #3D4F99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.034
- Dusk Blue #26538D ΔE 0.034
- Blueberry #464196 ΔE 0.037
- Denim Blue #3B5B92 ΔE 0.038
- Cobalt #1E488F ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.048
- Dusk #4E5481 ΔE 0.050
- Dark Slate Blue #483D8B ΔE 0.051
Use #3D4F99 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.