#40669E
Closest named color: Dusky Blue (#475F94). oklch(50.8% 0.1 258), rgb(64, 102, 158).
Aa
White text reads best on this color (5.81:1).
About this color
#40669E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.100 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.023 away. White text reads best on it, at 5.81:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.61:1 |
| White text | 5.81:1 |
Values
| HEX | #40669E |
| RGB | rgb(64, 102, 158) |
| HSL | hsl(216, 42%, 44%) |
| OKLCH | oklch(50.8% 0.1 258) |
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 #40669E | 5.81:1 | AA | Lc -84.2 | Fine for body text |
| Black text on #40669E | 3.61:1 | AA large text | Lc 25.1 | Dividers and decoration only |
| #40669E text on white | 5.81:1 | AA | Lc 78.9 | Fine for body text |
| #40669E text on black | 3.61:1 | AA large text | Lc -22.9 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CEDAEB
oklch(88.4% 0.027 257)
-
Step 300
300
#AEC2E0
oklch(80.9% 0.048 258.4)
-
Step 400
400
#83A2D1
oklch(70.7% 0.077 258.5)
-
Step 500
500
#638BC5
oklch(63.2% 0.099 257.6)
-
Step 600
600
#4A74B1
oklch(55.6% 0.106 257.7)
-
Step 700
700 (this color)
#40669E
oklch(50.8% 0.1 258)
-
Step 800
800
#314F7C
oklch(42.6% 0.083 258.3)
-
Step 900
900
#2B4263
oklch(37.6% 0.064 257.4)
-
Step 950
950
#1A273A
oklch(27% 0.04 257.8)
#40669E 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) | #4F6AA0 | 0.022 |
| Deuteranopia (no green cones) | #42619D | 0.014 |
| Tritanopia (no blue cones) | #00737A | 0.088 |
| Achromatopsia (no color) | #656565 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40669E
#40669E
oklch(50.8% 0.1 258)
- #855D11
#855D11
oklch(50.8% 0.1 77.4)
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 #40669E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.023
- French Blue #436BAD ΔE 0.026
- Denim #3B638C ΔE 0.030
- Muted Blue #3B719F ΔE 0.032
- Denim Blue #3B5B92 ΔE 0.035
- Mid Blue #276AB3 ΔE 0.037
- Flat Blue #3C73A8 ΔE 0.037
- Peacock Blue #016795 ΔE 0.042
Use #40669E 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.