#397AFE
Closest named color: Clear Blue (#247AFD). oklch(61.2% 0.208 262.4), rgb(57, 122, 254).
Aa
Black text reads best on this color (5.38:1).
About this color
#397AFE is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.208 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.013 away. Black text reads best on it, at 5.38:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.208) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.38:1 |
| White text | 3.89:1 |
Values
| HEX | #397AFE |
| RGB | rgb(57, 122, 254) |
| HSL | hsl(220, 99%, 61%) |
| OKLCH | oklch(61.2% 0.208 262.4) |
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 #397AFE | 3.89:1 | AA large text | Lc -71.4 | Content text, not long reading |
| Black text on #397AFE | 5.38:1 | AA | Lc 38.2 | Non-text elements, placeholder text |
| #397AFE text on white | 3.89:1 | AA large text | Lc 65.9 | Content text, not long reading |
| #397AFE text on black | 5.38:1 | AA | Lc -35.8 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#DFEAFE
oklch(93.5% 0.03 262.5)
-
Step 200
200
#C6DAFF
oklch(88.5% 0.056 262.8)
-
Step 300
300
#9FC1FF
oklch(80.9% 0.096 262.2)
-
Step 400
400
#6B9EFF
oklch(70.7% 0.153 262.2)
-
Step 500
500 (this color)
#397AFE
oklch(61.2% 0.208 262.4)
-
Step 600
600
#1F65F4
oklch(55.6% 0.225 262.3)
-
Step 700
700
#1252D5
oklch(49.1% 0.211 262.4)
-
Step 800
800
#1244AC
oklch(42.6% 0.175 262.4)
-
Step 900
900
#163B88
oklch(37.6% 0.136 262.5)
-
Step 950
950
#0E2450
oklch(27.2% 0.086 262.3)
#397AFE 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) | #168AFF | 0.040 |
| Deuteranopia (no green cones) | #0078FB | 0.025 |
| Tritanopia (no blue cones) | #009AB0 | 0.162 |
| Achromatopsia (no color) | #818181 | 0.208 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #397AFE
#397AFE
oklch(61.2% 0.208 262.4)
- #A97B00
#A97B00
oklch(61.2% 0.126 82.3)
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 #397AFE, closest first.
No curated palette has a color within ΔE 0.04 of #397AFE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.013
- Cerulean Blue #056EEE ΔE 0.049
- Cornflower #6A79F7 ΔE 0.050
- Dodger Blue #1E90FF ΔE 0.054
- Royal Blue #4169E1 ΔE 0.057
- Bright Blue #0165FC ΔE 0.061
- Neon Blue #4361EE ΔE 0.061
- Soft Blue #6488EA ΔE 0.067
Use #397AFE 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.