#4398EB
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.6% 0.148 250.6), rgb(67, 152, 235).
Aa
Black text reads best on this color (6.92:1).
About this color
#4398EB is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.148 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.011 away. Black text reads best on it, at 6.92:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.92:1 |
| White text | 3.03:1 |
Values
| HEX | #4398EB |
| RGB | rgb(67, 152, 235) |
| HSL | hsl(210, 81%, 59%) |
| OKLCH | oklch(66.6% 0.148 250.6) |
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 #4398EB | 3.03:1 | AA large text | Lc -62.1 | Content text, not long reading |
| Black text on #4398EB | 6.92:1 | AA | Lc 47.3 | Large or bold text, headings |
| #4398EB text on white | 3.03:1 | AA large text | Lc 56.7 | Large or bold text, headings |
| #4398EB text on black | 6.92:1 | AA | Lc -45.0 | Large or bold text, headings |
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
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C6DCF3
oklch(88.5% 0.04 249.5)
-
Step 300
300
#9EC5EE
oklch(81% 0.072 250)
-
Step 400
400
#66A5E6
oklch(70.6% 0.116 250.5)
-
Step 500
500 (this color)
#4398EB
oklch(66.6% 0.148 250.6)
-
Step 600
600
#0075CC
oklch(55.6% 0.16 250.6)
-
Step 700
700
#0062AD
oklch(49.1% 0.142 250.8)
-
Step 800
800
#00508F
oklch(42.6% 0.123 250.8)
-
Step 900
900
#0F4372
oklch(37.6% 0.096 250.5)
-
Step 950
950
#0B2843
oklch(27.1% 0.061 249.8)
#4398EB 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) | #729DEE | 0.048 |
| Deuteranopia (no green cones) | #5A8DE9 | 0.032 |
| Tritanopia (no blue cones) | #00ACB6 | 0.113 |
| Achromatopsia (no color) | #949494 | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4398EB
#4398EB
oklch(66.6% 0.148 250.6)
- #CB8200
#CB8200
oklch(66.7% 0.144 70.4)
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 #4398EB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.011
- Dark Sky Blue #448EE4 ΔE 0.027
- Cornflower Blue #6495ED ΔE 0.029
- Dodger Blue #1E90FF ΔE 0.045
- Soft Blue #6488EA ΔE 0.047
- Water Blue #0E87CC ΔE 0.071
- Faded Blue #658CBB ΔE 0.074
- Perrywinkle #8F8CE7 ΔE 0.083
Use #4398EB 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.