#4283F1
Closest named color: Dodger Blue (#1E90FF). oklch(62.4% 0.178 260.2), rgb(66, 131, 241).
Aa
Black text reads best on this color (5.74:1).
About this color
#4283F1 is a medium-light, vivid blue. In OKLCH its lightness is 62%, its chroma 0.178 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Dodger Blue (#1E90FF), ΔE 0.038 away. Black text reads best on it, at 5.74:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | vivid (0.178) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 5.74:1 |
| White text | 3.65:1 |
Values
| HEX | #4283F1 |
| RGB | rgb(66, 131, 241) |
| HSL | hsl(218, 86%, 60%) |
| OKLCH | oklch(62.4% 0.178 260.2) |
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 #4283F1 | 3.65:1 | AA large text | Lc -69.2 | Content text, not long reading |
| Black text on #4283F1 | 5.74:1 | AA | Lc 40.4 | Non-text elements, placeholder text |
| #4283F1 text on white | 3.65:1 | AA large text | Lc 63.7 | Content text, not long reading |
| #4283F1 text on black | 5.74:1 | AA | Lc -38.0 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C7DAFA
oklch(88.4% 0.049 260.9)
-
Step 300
300
#A0C2F9
oklch(80.9% 0.087 259.9)
-
Step 400
400
#6CA0F7
oklch(70.7% 0.14 260.2)
-
Step 500
500 (this color)
#4283F1
oklch(62.4% 0.178 260.2)
-
Step 600
600
#246CE2
oklch(55.7% 0.193 260.1)
-
Step 700
700
#1759C4
oklch(49.1% 0.18 260.2)
-
Step 800
800
#16499F
oklch(42.6% 0.15 260.4)
-
Step 900
900
#193E7E
oklch(37.6% 0.117 260.6)
-
Step 950
950
#0F254A
oklch(27% 0.074 260.2)
#4283F1 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) | #498EF5 | 0.030 |
| Deuteranopia (no green cones) | #217EEF | 0.027 |
| Tritanopia (no blue cones) | #009DAE | 0.141 |
| Achromatopsia (no color) | #868686 | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4283F1
#4283F1
oklch(62.4% 0.178 260.2)
- #B07D00
#B07D00
oklch(62.5% 0.129 79.9)
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 #4283F1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.038
- Clear Blue #247AFD ΔE 0.038
- Dark Sky Blue #448EE4 ΔE 0.038
- Soft Blue #6488EA ΔE 0.039
- Cornflower #6A79F7 ΔE 0.047
- Chefchaouen Blue #4895EF ΔE 0.049
- Cornflower Blue #6495ED ΔE 0.063
- Water Blue #0E87CC ΔE 0.066
Use #4283F1 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.