#40679E
Closest named color: Dusky Blue (#475F94). oklch(51.1% 0.099 257.1), rgb(64, 103, 158).
Aa
White text reads best on this color (5.75:1).
About this color
#40679E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.099 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.025 away. White text reads best on it, at 5.75:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.65:1 |
| White text | 5.75:1 |
Values
| HEX | #40679E |
| RGB | rgb(64, 103, 158) |
| HSL | hsl(215, 42%, 44%) |
| OKLCH | oklch(51.1% 0.099 257.1) |
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 #40679E | 5.75:1 | AA | Lc -83.9 | Fine for body text |
| Black text on #40679E | 3.65:1 | AA large text | Lc 25.5 | Dividers and decoration only |
| #40679E text on white | 5.75:1 | AA | Lc 78.6 | Fine for body text |
| #40679E text on black | 3.65:1 | AA large text | Lc -23.2 | 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
#82A3D0
oklch(70.8% 0.076 256.3)
-
Step 500
500
#638BC4
oklch(63.1% 0.097 257.3)
-
Step 600
600
#4974B1
oklch(55.6% 0.107 257.2)
-
Step 700
700 (this color)
#40679E
oklch(51.1% 0.099 257.1)
-
Step 800
800
#31507B
oklch(42.8% 0.081 256.8)
-
Step 900
900
#2B4263
oklch(37.6% 0.064 257.4)
-
Step 950
950
#1A273A
oklch(27% 0.04 257.8)
#40679E 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) | #506BA0 | 0.023 |
| Deuteranopia (no green cones) | #44629D | 0.014 |
| Tritanopia (no blue cones) | #00737B | 0.085 |
| Achromatopsia (no color) | #666666 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40679E
#40679E
oklch(51.1% 0.099 257.1)
- #855E15
#855E15
oklch(51.1% 0.098 77.7)
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 #40679E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.025
- French Blue #436BAD ΔE 0.025
- Muted Blue #3B719F ΔE 0.029
- Denim #3B638C ΔE 0.030
- Flat Blue #3C73A8 ΔE 0.034
- Mid Blue #276AB3 ΔE 0.037
- Denim Blue #3B5B92 ΔE 0.038
- Peacock Blue #016795 ΔE 0.042
Use #40679E 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.