#4089DC
Closest named color: Dark Sky Blue (#448EE4). oklch(62.3% 0.145 253.6), rgb(64, 137, 220).
Aa
Black text reads best on this color (5.82:1).
About this color
#4089DC is a medium-light, vivid blue. In OKLCH its lightness is 62%, its chroma 0.145 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.018 away. Black text reads best on it, at 5.82:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.82:1 |
| White text | 3.60:1 |
Values
| HEX | #4089DC |
| RGB | rgb(64, 137, 220) |
| HSL | hsl(212, 69%, 56%) |
| OKLCH | oklch(62.3% 0.145 253.6) |
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 #4089DC | 3.60:1 | AA large text | Lc -68.8 | Content text, not long reading |
| Black text on #4089DC | 5.82:1 | AA | Lc 40.8 | Non-text elements, placeholder text |
| #4089DC text on white | 3.60:1 | AA large text | Lc 63.3 | Content text, not long reading |
| #4089DC text on black | 5.82:1 | AA | Lc -38.4 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF3
oklch(88.5% 0.039 254.3)
-
Step 300
300
#A1C4EE
oklch(80.9% 0.071 253.2)
-
Step 400
400
#6CA4E6
oklch(70.7% 0.114 253.3)
-
Step 500
500 (this color)
#4089DC
oklch(62.3% 0.145 253.6)
-
Step 600
600
#1E73CC
oklch(55.5% 0.158 253.8)
-
Step 700
700
#0E60B1
oklch(49% 0.148 253.8)
-
Step 800
800
#114F8F
oklch(42.7% 0.122 253.6)
-
Step 900
900
#174272
oklch(37.6% 0.095 253.7)
-
Step 950
950
#0F2743
oklch(27% 0.06 253.9)
#4089DC 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) | #638FDF | 0.039 |
| Deuteranopia (no green cones) | #4B80DA | 0.024 |
| Tritanopia (no blue cones) | #009CA8 | 0.111 |
| Achromatopsia (no color) | #878787 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4089DC
#4089DC
oklch(62.3% 0.145 253.6)
- #B67900
#B67900
oklch(62.4% 0.132 73.9)
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 #4089DC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.018
- Water Blue #0E87CC ΔE 0.037
- Chefchaouen Blue #4895EF ΔE 0.041
- Soft Blue #6488EA ΔE 0.042
- Dodger Blue #1E90FF ΔE 0.053
- Cool Blue #4984B8 ΔE 0.054
- Cornflower Blue #6495ED ΔE 0.055
- Steel Blue #4682B4 ΔE 0.060
Use #4089DC 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.