#217BFF
Closest named color: Clear Blue (#247AFD). oklch(60.8% 0.213 259.1), rgb(33, 123, 255).
Aa
Black text reads best on this color (5.34:1).
About this color
#217BFF is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.213 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.004 away. Black text reads best on it, at 5.34:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.213) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.34:1 |
| White text | 3.93:1 |
Values
| HEX | #217BFF |
| RGB | rgb(33, 123, 255) |
| HSL | hsl(216, 100%, 56%) |
| OKLCH | oklch(60.8% 0.213 259.1) |
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 #217BFF | 3.93:1 | AA large text | Lc -71.5 | Content text, not long reading |
| Black text on #217BFF | 5.34:1 | AA | Lc 38.1 | Non-text elements, placeholder text |
| #217BFF text on white | 3.93:1 | AA large text | Lc 66.0 | Content text, not long reading |
| #217BFF text on black | 5.34:1 | AA | Lc -35.7 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DEEBFF
oklch(93.6% 0.031 258.9)
-
Step 200
200
#C3DBFF
oklch(88.5% 0.056 258.4)
-
Step 300
300
#9BC2FF
oklch(80.8% 0.097 259.2)
-
Step 400
400
#63A0FF
oklch(70.7% 0.154 259)
-
Step 500
500 (this color)
#217BFF
oklch(60.8% 0.213 259.1)
-
Step 600
600
#0069EE
oklch(55.5% 0.216 259.1)
-
Step 700
700
#0058CA
oklch(49.1% 0.191 259.1)
-
Step 800
800
#0048A7
oklch(42.7% 0.165 259)
-
Step 900
900
#063C89
oklch(37.6% 0.139 259.2)
-
Step 950
950
#072450
oklch(26.9% 0.088 259)
#217BFF 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) | #128BFF | 0.040 |
| Deuteranopia (no green cones) | #0077FC | 0.016 |
| Tritanopia (no blue cones) | #009CB1 | 0.163 |
| Achromatopsia (no color) | #808080 | 0.213 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #217BFF
#217BFF
oklch(60.8% 0.213 259.1)
- #AB7800
#AB7800
oklch(60.9% 0.127 78.9)
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 #217BFF, closest first.
No curated palette has a color within ΔE 0.04 of #217BFF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.004
- Cerulean Blue #056EEE ΔE 0.043
- Dodger Blue #1E90FF ΔE 0.053
- Bright Blue #0165FC ΔE 0.056
- Royal Blue #4169E1 ΔE 0.060
- Cornflower #6A79F7 ΔE 0.063
- Neon Blue #4361EE ΔE 0.064
- Dark Sky Blue #448EE4 ΔE 0.073
Use #217BFF 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.