#4E90CF
Closest named color: Dark Sky Blue (#448EE4). oklch(63.7% 0.117 249.1), rgb(78, 144, 207).
Aa
Black text reads best on this color (6.21:1).
About this color
#4E90CF is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.117 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.034 away. Black text reads best on it, at 6.21:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.21:1 |
| White text | 3.37:1 |
Values
| HEX | #4E90CF |
| RGB | rgb(78, 144, 207) |
| HSL | hsl(209, 57%, 56%) |
| OKLCH | oklch(63.7% 0.117 249.1) |
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 #4E90CF | 3.37:1 | AA large text | Lc -66.5 | Content text, not long reading |
| Black text on #4E90CF | 6.21:1 | AA | Lc 43.0 | Non-text elements, placeholder text |
| #4E90CF text on white | 3.37:1 | AA large text | Lc 61.0 | Content text, not long reading |
| #4E90CF text on black | 6.21:1 | AA | Lc -40.7 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CADBEE
oklch(88.5% 0.032 251.1)
-
Step 300
300
#A5C4E5
oklch(80.9% 0.058 250.2)
-
Step 400
400
#73A5D7
oklch(70.6% 0.091 249.2)
-
Step 500
500 (this color)
#4E90CF
oklch(63.7% 0.117 249.1)
-
Step 600
600
#2C77BA
oklch(55.6% 0.127 249.2)
-
Step 700
700
#1E64A0
oklch(49.2% 0.118 248.9)
-
Step 800
800
#1B5282
oklch(42.8% 0.098 248.8)
-
Step 900
900
#1D4468
oklch(37.7% 0.076 248.9)
-
Step 950
950
#12283D
oklch(27% 0.048 249)
#4E90CF 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) | #7593D2 | 0.044 |
| Deuteranopia (no green cones) | #6386CE | 0.032 |
| Tritanopia (no blue cones) | #009FA6 | 0.093 |
| Achromatopsia (no color) | #8C8C8C | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4E90CF
#4E90CF
oklch(63.7% 0.117 249.1)
- #B97D31
#B97D31
oklch(63.8% 0.117 68.9)
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 #4E90CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.034
- Faded Blue #658CBB ΔE 0.035
- Cool Blue #4984B8 ΔE 0.044
- Chefchaouen Blue #4895EF ΔE 0.047
- Water Blue #0E87CC ΔE 0.048
- Cornflower Blue #6495ED ΔE 0.052
- Dusty Blue #5A86AD ΔE 0.052
- Steel Blue #4682B4 ΔE 0.053
Use #4E90CF 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.