#4590EB
Closest named color: Dark Sky Blue (#448EE4). oklch(64.9% 0.156 254.8), rgb(69, 144, 235).
Aa
Black text reads best on this color (6.44:1).
About this color
#4590EB is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.156 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.011 away. Black text reads best on it, at 6.44:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.44:1 |
| White text | 3.25:1 |
Values
| HEX | #4590EB |
| RGB | rgb(69, 144, 235) |
| HSL | hsl(213, 81%, 60%) |
| OKLCH | oklch(64.9% 0.156 254.8) |
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 #4590EB | 3.25:1 | AA large text | Lc -65.0 | Content text, not long reading |
| Black text on #4590EB | 6.44:1 | AA | Lc 44.5 | Non-text elements, placeholder text |
| #4590EB text on white | 3.25:1 | AA large text | Lc 59.6 | Large or bold text, headings |
| #4590EB text on black | 6.44:1 | AA | Lc -42.2 | 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
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF5
oklch(88.5% 0.042 255)
-
Step 300
300
#A0C4F2
oklch(81% 0.076 254.8)
-
Step 400
400
#6AA3EB
oklch(70.6% 0.122 254.9)
-
Step 500
500 (this color)
#4590EB
oklch(64.9% 0.156 254.8)
-
Step 600
600
#1872D3
oklch(55.6% 0.169 254.8)
-
Step 700
700
#065FB7
oklch(49.1% 0.158 254.8)
-
Step 800
800
#0D4E94
oklch(42.7% 0.13 254.9)
-
Step 900
900
#154276
oklch(37.8% 0.101 254.6)
-
Step 950
950
#0E2745
oklch(27.1% 0.064 254.6)
#4590EB 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) | #6697EF | 0.039 |
| Deuteranopia (no green cones) | #4C87E9 | 0.023 |
| Tritanopia (no blue cones) | #00A5B2 | 0.120 |
| Achromatopsia (no color) | #8E8E8E | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4590EB
#4590EB
oklch(64.9% 0.156 254.8)
- #BF8100
#BF8100
oklch(65% 0.137 75.2)
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 #4590EB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.011
- Chefchaouen Blue #4895EF ΔE 0.014
- Soft Blue #6488EA ΔE 0.033
- Cornflower Blue #6495ED ΔE 0.034
- Dodger Blue #1E90FF ΔE 0.035
- Water Blue #0E87CC ΔE 0.061
- Cornflower #6A79F7 ΔE 0.069
- Clear Blue #247AFD ΔE 0.072
Use #4590EB 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.