#217FCA
Closest named color: Water Blue (#0E87CC). oklch(58.1% 0.142 248.1), rgb(33, 127, 202).
Aa
Black text reads best on this color (4.95:1).
About this color
#217FCA is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.142 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.022 away. Black text reads best on it, at 4.95:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 4.95:1 |
| White text | 4.23:1 |
Values
| HEX | #217FCA |
| RGB | rgb(33, 127, 202) |
| HSL | hsl(207, 72%, 46%) |
| OKLCH | oklch(58.1% 0.142 248.1) |
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 #217FCA | 4.23:1 | AA large text | Lc -74.3 | Content text, not long reading |
| Black text on #217FCA | 4.95:1 | AA | Lc 35.3 | Non-text elements, placeholder text |
| #217FCA text on white | 4.23:1 | AA large text | Lc 68.8 | Content text, not long reading |
| #217FCA text on black | 4.95:1 | AA | Lc -32.9 | 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 600.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C7DCF0
oklch(88.5% 0.036 246.9)
-
Step 300
300
#A1C5E9
oklch(81% 0.064 248.6)
-
Step 400
400
#6BA6DE
oklch(70.7% 0.103 248.2)
-
Step 500
500
#3F8ED4
oklch(63% 0.131 248.3)
-
Step 600
600 (this color)
#217FCA
oklch(58.1% 0.142 248.1)
-
Step 700
700
#0064A7
oklch(49.1% 0.132 247.9)
-
Step 800
800
#0A5287
oklch(42.7% 0.109 247.7)
-
Step 900
900
#15446C
oklch(37.7% 0.085 248.2)
-
Step 950
950
#0E283F
oklch(26.9% 0.054 248)
#217FCA 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) | #5B83CD | 0.050 |
| Deuteranopia (no green cones) | #4174C9 | 0.033 |
| Tritanopia (no blue cones) | #00919B | 0.102 |
| Achromatopsia (no color) | #7B7B7B | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #217FCA
#217FCA
oklch(58.1% 0.142 248.1)
- #AB6A00
#AB6A00
oklch(58.2% 0.127 68.3)
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 #217FCA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.022
- Windows Blue #3778BF ΔE 0.024
- Nice Blue #107AB0 ΔE 0.042
- Steel Blue #4682B4 ΔE 0.044
- Cool Blue #4984B8 ΔE 0.044
- Blue NCS #118AB2 ΔE 0.055
- Flat Blue #3C73A8 ΔE 0.056
- Dark Sky Blue #448EE4 ΔE 0.061
Use #217FCA 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.