#217EA2
Closest named color: Cerulean (#457B9D). oklch(55.7% 0.099 229.2), rgb(33, 126, 162).
Aa
White text reads best on this color (4.59:1).
About this color
#217EA2 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 56%, its chroma 0.099 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.025 away. White text reads best on it, at 4.59:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.57:1 |
| White text | 4.59:1 |
Values
| HEX | #217EA2 |
| RGB | rgb(33, 126, 162) |
| HSL | hsl(197, 66%, 38%) |
| OKLCH | oklch(55.7% 0.099 229.2) |
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 #217EA2 | 4.59:1 | AA | Lc -77.0 | Fine for body text |
| Black text on #217EA2 | 4.57:1 | AA | Lc 32.5 | Non-text elements, placeholder text |
| #217EA2 text on white | 4.59:1 | AA | Lc 71.5 | Content text, not long reading |
| #217EA2 text on black | 4.57:1 | AA | Lc -30.1 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#C9DDE6
oklch(88.5% 0.025 226.5)
-
Step 300
300
#A4C7D8
oklch(81% 0.044 228.9)
-
Step 400
400
#70AAC5
oklch(70.8% 0.072 229)
-
Step 500
500
#4694B6
oklch(63.1% 0.092 229.2)
-
Step 600
600 (this color)
#217EA2
oklch(55.7% 0.099 229.2)
-
Step 700
700
#106A8A
oklch(49.1% 0.092 228.8)
-
Step 800
800
#135670
oklch(42.6% 0.076 229.4)
-
Step 900
900
#19475B
oklch(37.6% 0.06 230.1)
-
Step 950
950
#102A35
oklch(27% 0.038 228.2)
#217EA2 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) | #6B7CA4 | 0.069 |
| Deuteranopia (no green cones) | #5A70A1 | 0.059 |
| Tritanopia (no blue cones) | #00888A | 0.056 |
| Achromatopsia (no color) | #757575 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #217EA2
#217EA2
oklch(55.7% 0.099 229.2)
- #A2613C
#A2613C
oklch(55.8% 0.099 49.4)
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 #217EA2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.025
- Nice Blue #107AB0 ΔE 0.028
- Ocean #017B92 ΔE 0.029
- Teal Blue #01889F ΔE 0.032
- Dull Blue #49759C ΔE 0.035
- Stormy Blue #507B9C ΔE 0.036
- Sea Blue #047495 ΔE 0.036
- Blue NCS #118AB2 ΔE 0.037
Use #217EA2 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.