#4099DE
Closest named color: Chefchaouen Blue (#4895EF). oklch(66% 0.133 245.3), rgb(64, 153, 222).
Aa
Black text reads best on this color (6.82:1).
About this color
#4099DE is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.133 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.031 away. Black text reads best on it, at 6.82:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.82:1 |
| White text | 3.07:1 |
Values
| HEX | #4099DE |
| RGB | rgb(64, 153, 222) |
| HSL | hsl(206, 71%, 56%) |
| OKLCH | oklch(66% 0.133 245.3) |
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 #4099DE | 3.07:1 | AA large text | Lc -62.7 | Content text, not long reading |
| Black text on #4099DE | 6.82:1 | AA | Lc 46.7 | Large or bold text, headings |
| #4099DE text on white | 3.07:1 | AA large text | Lc 57.3 | Large or bold text, headings |
| #4099DE text on black | 6.82:1 | AA | Lc -44.4 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0ECF6
oklch(93.7% 0.019 243)
-
Step 200
200
#C6DCF0
oklch(88.4% 0.036 245.7)
-
Step 300
300
#9EC6E9
oklch(81% 0.065 245.1)
-
Step 400
400
#66A7DD
oklch(70.7% 0.104 245.1)
-
Step 500
500 (this color)
#4099DE
oklch(66% 0.133 245.3)
-
Step 600
600
#0079C0
oklch(55.7% 0.141 245.3)
-
Step 700
700
#0065A2
oklch(49% 0.125 245.5)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900
#0D456C
oklch(37.7% 0.086 245)
-
Step 950
950
#0B293F
oklch(27.1% 0.054 244.1)
#4099DE 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) | #7A9BE1 | 0.057 |
| Deuteranopia (no green cones) | #648CDD | 0.043 |
| Tritanopia (no blue cones) | #00AAB2 | 0.096 |
| Achromatopsia (no color) | #939393 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4099DE
#4099DE
oklch(66% 0.133 245.3)
- #C97F27
#C97F27
oklch(66% 0.133 65.3)
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 #4099DE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.031
- Dark Sky Blue #448EE4 ΔE 0.033
- Cornflower Blue #6495ED ΔE 0.042
- Soft Blue #6488EA ΔE 0.058
- Faded Blue #658CBB ΔE 0.060
- Dodger Blue #1E90FF ΔE 0.062
- Water Blue #0E87CC ΔE 0.063
- Cool Blue #4984B8 ΔE 0.072
Use #4099DE 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.