#40589A
Closest named color: Denim Blue (#3B5B92). oklch(47.4% 0.111 267.1), rgb(64, 88, 154).
Aa
White text reads best on this color (6.81:1).
About this color
#40589A is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.111 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.018 away. White text reads best on it, at 6.81:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.08:1 |
| White text | 6.81:1 |
Values
| HEX | #40589A |
| RGB | rgb(64, 88, 154) |
| HSL | hsl(224, 41%, 43%) |
| OKLCH | oklch(47.4% 0.111 267.1) |
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 #40589A | 6.81:1 | AA | Lc -88.4 | Fine for body text |
| Black text on #40589A | 3.08:1 | AA large text | Lc 20.7 | Dividers and decoration only |
| #40589A text on white | 6.81:1 | AA | Lc 83.4 | Fine for body text |
| #40589A text on black | 3.08:1 | AA large text | Lc -18.6 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D0D9EE
oklch(88.5% 0.031 267.2)
-
Step 300
300
#B1C0E4
oklch(80.8% 0.054 267.4)
-
Step 400
400
#899FD7
oklch(70.7% 0.086 267.6)
-
Step 500
500
#6C87CC
oklch(63.2% 0.109 267)
-
Step 600
600
#546FB9
oklch(55.5% 0.12 267.3)
-
Step 700
700 (this color)
#40589A
oklch(47.4% 0.111 267.1)
-
Step 800
800
#384C81
oklch(42.7% 0.092 266.9)
-
Step 900
900
#304068
oklch(37.8% 0.072 266.5)
-
Step 950
950
#1C263D
oklch(27.1% 0.045 265.6)
#40589A 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) | #3B5F9D | 0.019 |
| Deuteranopia (no green cones) | #305799 | 0.019 |
| Tritanopia (no blue cones) | #006771 | 0.100 |
| Achromatopsia (no color) | #5B5B5B | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40589A
#40589A
oklch(47.4% 0.111 267.1)
- #735800
#735800
oklch(47.5% 0.097 87.9)
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 #40589A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.018
- Dusky Blue #475F94 ΔE 0.026
- Twilight #4E518B ΔE 0.032
- Light Navy Blue #2E5A88 ΔE 0.038
- Dusk Blue #26538D ΔE 0.039
- Dusk #4E5481 ΔE 0.043
- Denim #3B638C ΔE 0.043
- Peacock Blue #016795 ΔE 0.057
Use #40589A 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.