#217B99
Closest named color: Ocean (#017B92). oklch(54.5% 0.093 225.3), rgb(33, 123, 153).
Aa
White text reads best on this color (4.81:1).
About this color
#217B99 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 55%, its chroma 0.093 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.016 away. White text reads best on it, at 4.81:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.35:1 |
| White text | 4.81:1 |
Values
| HEX | #217B99 |
| RGB | rgb(33, 123, 153) |
| HSL | hsl(195, 65%, 36%) |
| OKLCH | oklch(54.5% 0.093 225.3) |
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 #217B99 | 4.81:1 | AA | Lc -78.5 | Fine for body text |
| Black text on #217B99 | 4.35:1 | AA large text | Lc 31.0 | Non-text elements, placeholder text |
| #217B99 text on white | 4.81:1 | AA | Lc 73.1 | Content text, not long reading |
| #217B99 text on black | 4.35:1 | AA large text | Lc -28.6 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CADDE5
oklch(88.6% 0.023 224.9)
-
Step 300
300
#A5C7D5
oklch(80.9% 0.041 224.8)
-
Step 400
400
#72AAC0
oklch(70.7% 0.067 224.6)
-
Step 500
500
#4994B1
oklch(63% 0.086 225.9)
-
Step 600
600 (this color)
#217B99
oklch(54.5% 0.093 225.3)
-
Step 700
700
#166A86
oklch(49% 0.087 226.1)
-
Step 800
800
#17576D
oklch(42.8% 0.072 225.6)
-
Step 900
900
#1B4858
oklch(37.8% 0.056 224.7)
-
Step 950
950
#112A33
oklch(26.9% 0.035 224)
#217B99 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) | #6A789B | 0.070 |
| Deuteranopia (no green cones) | #5B6D99 | 0.062 |
| Tritanopia (no blue cones) | #008485 | 0.049 |
| Achromatopsia (no color) | #727272 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #217B99
#217B99
oklch(54.5% 0.093 225.3)
- #9D5E40
#9D5E40
oklch(54.6% 0.093 45.7)
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 #217B99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.016
- Sea Blue #047495 ΔE 0.025
- Cerulean #457B9D ΔE 0.028
- Dull Blue #49759C ΔE 0.035
- Ocean Blue #03719C ΔE 0.035
- Muted Blue #3B719F ΔE 0.036
- Teal Blue #01889F ΔE 0.037
- Nice Blue #107AB0 ΔE 0.038
Use #217B99 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.