#307DF3
Closest named color: Clear Blue (#247AFD). oklch(60.7% 0.193 259.1), rgb(48, 125, 243).
Aa
Black text reads best on this color (5.35:1).
About this color
#307DF3 is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.193 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.019 away. Black text reads best on it, at 5.35:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.193) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.35:1 |
| White text | 3.92:1 |
Values
| HEX | #307DF3 |
| RGB | rgb(48, 125, 243) |
| HSL | hsl(216, 89%, 57%) |
| OKLCH | oklch(60.7% 0.193 259.1) |
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 #307DF3 | 3.92:1 | AA large text | Lc -71.6 | Content text, not long reading |
| Black text on #307DF3 | 5.35:1 | AA | Lc 38.0 | Non-text elements, placeholder text |
| #307DF3 text on white | 3.92:1 | AA large text | Lc 66.1 | Content text, not long reading |
| #307DF3 text on black | 5.35:1 | AA | Lc -35.6 | 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
#C5DBFC
oklch(88.6% 0.051 258.4)
-
Step 300
300
#9CC2FE
oklch(80.9% 0.095 259.4)
-
Step 400
400
#65A0FD
oklch(70.7% 0.15 259.2)
-
Step 500
500 (this color)
#307DF3
oklch(60.7% 0.193 259.1)
-
Step 600
600
#0C6AEA
oklch(55.5% 0.209 259.1)
-
Step 700
700
#0058CA
oklch(49.1% 0.191 259.1)
-
Step 800
800
#0548A5
oklch(42.6% 0.162 259.3)
-
Step 900
900
#103E83
oklch(37.7% 0.126 259.1)
-
Step 950
950
#0B254C
oklch(27% 0.079 258.6)
#307DF3 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) | #368AF7 | 0.035 |
| Deuteranopia (no green cones) | #0078F1 | 0.024 |
| Tritanopia (no blue cones) | #009AAC | 0.150 |
| Achromatopsia (no color) | #808080 | 0.193 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #307DF3
#307DF3
oklch(60.7% 0.193 259.1)
- #AA7800
#AA7800
oklch(60.8% 0.126 79.4)
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 #307DF3, closest first.
No curated palette has a color within ΔE 0.04 of #307DF3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.019
- Cerulean Blue #056EEE ΔE 0.045
- Dodger Blue #1E90FF ΔE 0.049
- Royal Blue #4169E1 ΔE 0.053
- Cornflower #6A79F7 ΔE 0.056
- Dark Sky Blue #448EE4 ΔE 0.057
- Soft Blue #6488EA ΔE 0.061
- Neon Blue #4361EE ΔE 0.066
Use #307DF3 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.