#307FFA
Closest named color: Clear Blue (#247AFD). oklch(61.6% 0.199 259.4), rgb(48, 127, 250).
Aa
Black text reads best on this color (5.54:1).
About this color
#307FFA is a medium-dark, vivid blue. In OKLCH its lightness is 62%, its chroma 0.199 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.016 away. Black text reads best on it, at 5.54:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.199) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.54:1 |
| White text | 3.78:1 |
Values
| HEX | #307FFA |
| RGB | rgb(48, 127, 250) |
| HSL | hsl(217, 95%, 58%) |
| OKLCH | oklch(61.6% 0.199 259.4) |
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 #307FFA | 3.78:1 | AA large text | Lc -70.4 | Content text, not long reading |
| Black text on #307FFA | 5.54:1 | AA | Lc 39.2 | Non-text elements, placeholder text |
| #307FFA text on white | 3.78:1 | AA large text | Lc 64.9 | Content text, not long reading |
| #307FFA text on black | 5.54:1 | AA | Lc -36.8 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C4DBFE
oklch(88.6% 0.054 258.7)
-
Step 300
300
#9CC2FF
oklch(80.9% 0.096 259.7)
-
Step 400
400
#64A0FF
oklch(70.8% 0.153 259.2)
-
Step 500
500 (this color)
#307FFA
oklch(61.6% 0.199 259.4)
-
Step 600
600
#0469EF
oklch(55.6% 0.217 259.4)
-
Step 700
700
#0058CB
oklch(49.1% 0.193 259.2)
-
Step 800
800
#0248A8
oklch(42.8% 0.167 259.3)
-
Step 900
900
#0F3D85
oklch(37.6% 0.131 259.7)
-
Step 950
950
#0B254E
oklch(27.1% 0.082 259.4)
#307FFA 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) | #328DFE | 0.036 |
| Deuteranopia (no green cones) | #007AF8 | 0.023 |
| Tritanopia (no blue cones) | #009DB1 | 0.153 |
| Achromatopsia (no color) | #838383 | 0.199 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #307FFA
#307FFA
oklch(61.6% 0.199 259.4)
- #AD7A00
#AD7A00
oklch(61.5% 0.128 79.3)
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 #307FFA, closest first.
No curated palette has a color within ΔE 0.04 of #307FFA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.016
- Dodger Blue #1E90FF ΔE 0.042
- Cerulean Blue #056EEE ΔE 0.052
- Cornflower #6A79F7 ΔE 0.054
- Dark Sky Blue #448EE4 ΔE 0.058
- Soft Blue #6488EA ΔE 0.060
- Royal Blue #4169E1 ΔE 0.062
- Chefchaouen Blue #4895EF ΔE 0.067
Use #307FFA 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.