#4397FF
Closest named color: Chefchaouen Blue (#4895EF). oklch(67.6% 0.174 255.4), rgb(67, 151, 255).
Aa
Black text reads best on this color (7.10:1).
About this color
#4397FF is a medium-light, vivid blue. In OKLCH its lightness is 68%, its chroma 0.174 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.023 away. Black text reads best on it, at 7.10:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.174) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.10:1 |
| White text | 2.95:1 |
Values
| HEX | #4397FF |
| RGB | rgb(67, 151, 255) |
| HSL | hsl(213, 100%, 63%) |
| OKLCH | oklch(67.6% 0.174 255.4) |
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 #4397FF | 2.95:1 | Fails | Lc -61.0 | Content text, not long reading |
| Black text on #4397FF | 7.10:1 | AAA | Lc 48.4 | Large or bold text, headings |
| #4397FF text on white | 2.95:1 | Fails | Lc 55.7 | Large or bold text, headings |
| #4397FF text on black | 7.10:1 | AAA | Lc -46.1 | 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 400.
-
Step 50
50
#EFF6FF
oklch(97% 0.014 254.6)
-
Step 100
100
#DDEBFF
oklch(93.6% 0.031 257.2)
-
Step 200
200
#C1DCFF
oklch(88.6% 0.056 255)
-
Step 300
300
#96C4FF
oklch(81% 0.097 254.9)
-
Step 400
400 (this color)
#4397FF
oklch(67.6% 0.174 255.4)
-
Step 500
500
#1787FF
oklch(63.2% 0.201 255.3)
-
Step 600
600
#0070DC
oklch(55.6% 0.186 255.4)
-
Step 700
700
#005EBB
oklch(49.1% 0.165 255.5)
-
Step 800
800
#004D9A
oklch(42.7% 0.142 255.2)
-
Step 900
900
#004082
oklch(37.8% 0.125 255.2)
-
Step 950
950
#002551
oklch(27% 0.09 255.5)
#4397FF 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) | #659FFF | 0.039 |
| Deuteranopia (no green cones) | #458EFD | 0.023 |
| Tritanopia (no blue cones) | #00AFBF | 0.132 |
| Achromatopsia (no color) | #969696 | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4397FF
#4397FF
oklch(67.6% 0.174 255.4)
- #C98800
#C98800
oklch(67.6% 0.142 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 #4397FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.023
- Dodger Blue #1E90FF ΔE 0.029
- Cornflower Blue #6495ED ΔE 0.036
- Dark Sky Blue #448EE4 ΔE 0.043
- Soft Blue #6488EA ΔE 0.049
- Cornflower #6A79F7 ΔE 0.077
- Lavender Blue #8B88F8 ΔE 0.079
- Periwinkle Blue #8F99FB ΔE 0.080
Use #4397FF 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.