#40559C
Closest named color: Denim Blue (#3B5B92). oklch(46.9% 0.118 269.1), rgb(64, 85, 156).
Aa
White text reads best on this color (7.00:1).
About this color
#40559C is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.118 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.026 away. White text reads best on it, at 7.00:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 2.99:1 |
| White text | 7.00:1 |
Values
| HEX | #40559C |
| RGB | rgb(64, 85, 156) |
| HSL | hsl(226, 42%, 43%) |
| OKLCH | oklch(46.9% 0.118 269.1) |
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 #40559C | 7.00:1 | AAA | Lc -89.0 | Fine for body text |
| Black text on #40559C | 2.99:1 | Fails | Lc 20.0 | Dividers and decoration only |
| #40559C text on white | 7.00:1 | AAA | Lc 84.1 | Fine for body text |
| #40559C text on black | 2.99:1 | Fails | Lc -17.9 | 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
#D0D9EF
oklch(88.5% 0.032 268)
-
Step 300
300
#B1C0E6
oklch(80.9% 0.056 268.2)
-
Step 400
400
#899EDA
oklch(70.6% 0.091 269.2)
-
Step 500
500
#6D85D0
oklch(63.1% 0.117 269.4)
-
Step 600
600
#556EBD
oklch(55.6% 0.126 268.8)
-
Step 700
700 (this color)
#40559C
oklch(46.9% 0.118 269.1)
-
Step 800
800
#394B84
oklch(42.7% 0.097 268.8)
-
Step 900
900
#313F6A
oklch(37.7% 0.076 268.9)
-
Step 950
950
#1D253E
oklch(27% 0.048 269.5)
#40559C 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) | #355D9F | 0.023 |
| Deuteranopia (no green cones) | #28559A | 0.026 |
| Tritanopia (no blue cones) | #006571 | 0.104 |
| Achromatopsia (no color) | #595959 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40559C
#40559C
oklch(46.9% 0.118 269.1)
- #705700
#705700
oklch(46.9% 0.096 89.3)
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 #40559C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.026
- Twilight #4E518B ΔE 0.032
- Dusky Blue #475F94 ΔE 0.036
- Dusk Blue #26538D ΔE 0.039
- Light Navy Blue #2E5A88 ΔE 0.043
- Dusk #4E5481 ΔE 0.047
- Blueberry #464196 ΔE 0.052
- Denim #3B638C ΔE 0.053
Use #40559C 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.