#40529A
Closest named color: Twilight (#4E518B). oklch(46.1% 0.119 270.6), rgb(64, 82, 154).
Aa
White text reads best on this color (7.26:1).
About this color
#40529A is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.119 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.030 away. White text reads best on it, at 7.26:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.89:1 |
| White text | 7.26:1 |
Values
| HEX | #40529A |
| RGB | rgb(64, 82, 154) |
| HSL | hsl(228, 41%, 43%) |
| OKLCH | oklch(46.1% 0.119 270.6) |
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 #40529A | 7.26:1 | AAA | Lc -89.9 | Fine for body text |
| Black text on #40529A | 2.89:1 | Fails | Lc 19.0 | Dividers and decoration only |
| #40529A text on white | 7.26:1 | AAA | Lc 85.0 | Fine for body text |
| #40529A text on black | 2.89:1 | Fails | Lc -17.0 | 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 700.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D1D9EF
oklch(88.6% 0.031 269.8)
-
Step 300
300
#B2BFE7
oklch(80.8% 0.058 270.9)
-
Step 400
400
#8B9EDA
oklch(70.7% 0.091 270.5)
-
Step 500
500
#6F85D0
oklch(63.2% 0.116 270.4)
-
Step 600
600
#586DBE
oklch(55.7% 0.128 270.8)
-
Step 700
700 (this color)
#40529A
oklch(46.1% 0.119 270.6)
-
Step 800
800
#3B4A84
oklch(42.6% 0.098 270.8)
-
Step 900
900
#323E6A
oklch(37.6% 0.077 270.8)
-
Step 950
950
#1D253E
oklch(27% 0.048 269.5)
#40529A 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) | #315B9D | 0.027 |
| Deuteranopia (no green cones) | #245398 | 0.030 |
| Tritanopia (no blue cones) | #00626E | 0.106 |
| Achromatopsia (no color) | #575757 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40529A
#40529A
oklch(46.1% 0.119 270.6)
- #6C5500
#6C5500
oklch(46% 0.094 90.5)
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 #40529A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.030
- Denim Blue #3B5B92 ΔE 0.031
- Dusk Blue #26538D ΔE 0.037
- Dusky Blue #475F94 ΔE 0.042
- Blueberry #464196 ΔE 0.044
- Light Navy Blue #2E5A88 ΔE 0.045
- Dusk #4E5481 ΔE 0.046
- Cobalt #1E488F ΔE 0.053
Use #40529A 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.