#217AAD
Closest named color: Nice Blue (#107AB0). oklch(55.3% 0.113 239.5), rgb(33, 122, 173).
Aa
White text reads best on this color (4.71:1).
About this color
#217AAD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.113 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.007 away. White text reads best on it, at 4.71:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.45:1 |
| White text | 4.71:1 |
Values
| HEX | #217AAD |
| RGB | rgb(33, 122, 173) |
| HSL | hsl(202, 68%, 40%) |
| OKLCH | oklch(55.3% 0.113 239.5) |
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 #217AAD | 4.71:1 | AA | Lc -77.8 | Fine for body text |
| Black text on #217AAD | 4.45:1 | AA large text | Lc 31.7 | Non-text elements, placeholder text |
| #217AAD text on white | 4.71:1 | AA | Lc 72.4 | Content text, not long reading |
| #217AAD text on black | 4.45:1 | AA large text | Lc -29.3 | Dividers and decoration only |
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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF3
oklch(93.5% 0.015 241.8)
-
Step 200
200
#C9DCEA
oklch(88.5% 0.028 239.7)
-
Step 300
300
#A3C6DE
oklch(80.9% 0.051 238.2)
-
Step 400
400
#70A8CE
oklch(70.7% 0.081 239.1)
-
Step 500
500
#4791C2
oklch(63% 0.104 240.3)
-
Step 600
600 (this color)
#217AAD
oklch(55.3% 0.113 239.5)
-
Step 700
700
#126795
oklch(49% 0.105 239.5)
-
Step 800
800
#145479
oklch(42.6% 0.087 239.7)
-
Step 900
900
#1A4662
oklch(37.8% 0.068 240)
-
Step 950
950
#102939
oklch(26.9% 0.043 239.2)
#217AAD 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) | #627AAF | 0.059 |
| Deuteranopia (no green cones) | #4F6EAC | 0.046 |
| Tritanopia (no blue cones) | #00878C | 0.075 |
| Achromatopsia (no color) | #737373 | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #217AAD
#217AAD
oklch(55.3% 0.113 239.5)
- #A26023
#A26023
oklch(55.3% 0.113 59.1)
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 #217AAD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.007
- Flat Blue #3C73A8 ΔE 0.024
- Muted Blue #3B719F ΔE 0.031
- Windows Blue #3778BF ΔE 0.034
- Cerulean #457B9D ΔE 0.035
- Dull Blue #49759C ΔE 0.037
- Ocean Blue #03719C ΔE 0.038
- Steel Blue #4682B4 ΔE 0.039
Use #217AAD 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.