#4590DE
Closest named color: Dark Sky Blue (#448EE4). oklch(64.2% 0.139 251.6), rgb(69, 144, 222).
Aa
Black text reads best on this color (6.29:1).
About this color
#4590DE is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.139 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.012 away. Black text reads best on it, at 6.29:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.29:1 |
| White text | 3.33:1 |
Values
| HEX | #4590DE |
| RGB | rgb(69, 144, 222) |
| HSL | hsl(211, 70%, 57%) |
| OKLCH | oklch(64.2% 0.139 251.6) |
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 #4590DE | 3.33:1 | AA large text | Lc -65.9 | Content text, not long reading |
| Black text on #4590DE | 6.29:1 | AA | Lc 43.6 | Non-text elements, placeholder text |
| #4590DE text on white | 3.33:1 | AA large text | Lc 60.5 | Content text, not long reading |
| #4590DE text on black | 6.29:1 | AA | Lc -41.2 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C8DBF2
oklch(88.4% 0.038 253.2)
-
Step 300
300
#A1C4EC
oklch(80.9% 0.068 252)
-
Step 400
400
#6CA5E2
oklch(70.7% 0.108 251.1)
-
Step 500
500 (this color)
#4590DE
oklch(64.2% 0.139 251.6)
-
Step 600
600
#1B75C8
oklch(55.6% 0.151 251.6)
-
Step 700
700
#0A62AD
oklch(49.2% 0.141 251.6)
-
Step 800
800
#0F508C
oklch(42.7% 0.117 251.7)
-
Step 900
900
#164370
oklch(37.7% 0.091 251.6)
-
Step 950
950
#0F2841
oklch(27.1% 0.056 250.6)
#4590DE 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) | #6D95E1 | 0.043 |
| Deuteranopia (no green cones) | #5786DC | 0.029 |
| Tritanopia (no blue cones) | #00A2AC | 0.107 |
| Achromatopsia (no color) | #8D8D8D | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4590DE
#4590DE
oklch(64.2% 0.139 251.6)
- #C07C00
#C07C00
oklch(64.2% 0.138 71.3)
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 #4590DE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.012
- Chefchaouen Blue #4895EF ΔE 0.027
- Cornflower Blue #6495ED ΔE 0.041
- Soft Blue #6488EA ΔE 0.041
- Water Blue #0E87CC ΔE 0.048
- Dodger Blue #1E90FF ΔE 0.052
- Faded Blue #658CBB ΔE 0.057
- Cool Blue #4984B8 ΔE 0.060
Use #4590DE 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.