#3D4F9A
Closest named color: Twilight (#4E518B). oklch(45.3% 0.124 270.6), rgb(61, 79, 154).
Aa
White text reads best on this color (7.54:1).
About this color
#3D4F9A is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.124 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.035 away. White text reads best on it, at 7.54:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.78:1 |
| White text | 7.54:1 |
Values
| HEX | #3D4F9A |
| RGB | rgb(61, 79, 154) |
| HSL | hsl(228, 43%, 42%) |
| OKLCH | oklch(45.3% 0.124 270.6) |
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 #3D4F9A | 7.54:1 | AAA | Lc -90.8 | Preferred for body text |
| Black text on #3D4F9A | 2.78:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #3D4F9A text on white | 7.54:1 | AAA | Lc 86.0 | Fine for body text |
| #3D4F9A text on black | 2.78:1 | Fails | Lc -16.1 | 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
#E4E9F8
oklch(93.5% 0.021 271.2)
-
Step 200
200
#CFD8F5
oklch(88.4% 0.041 271.9)
-
Step 300
300
#AFBFF0
oklch(80.9% 0.072 270.6)
-
Step 400
400
#859CE9
oklch(70.6% 0.116 270.6)
-
Step 500
500
#6882E2
oklch(63.1% 0.147 270.3)
-
Step 600
600
#5169D0
oklch(55.6% 0.161 270.5)
-
Step 700
700
#4257B4
oklch(49.1% 0.149 270.5)
-
Step 800
800 (this color)
#3D4F9A
oklch(45.3% 0.124 270.6)
-
Step 900
900
#2F3D74
oklch(37.8% 0.095 270.5)
-
Step 950
950
#1B2444
oklch(27% 0.061 270.1)
#3D4F9A 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) | #2A599D | 0.031 |
| Deuteranopia (no green cones) | #1B5098 | 0.034 |
| Tritanopia (no blue cones) | #00606D | 0.108 |
| Achromatopsia (no color) | #545454 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D4F9A
#3D4F9A
oklch(45.3% 0.124 270.6)
- #6A5300
#6A5300
oklch(45.3% 0.093 90.1)
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 #3D4F9A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.035
- Dusk Blue #26538D ΔE 0.035
- Blueberry #464196 ΔE 0.037
- Denim Blue #3B5B92 ΔE 0.038
- Cobalt #1E488F ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.049
- Dark Slate Blue #483D8B ΔE 0.051
- Dusky Blue #475F94 ΔE 0.051
Use #3D4F9A 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.