#217B75
Closest named color: Bluegreen (#017A79). oklch(53% 0.082 188.4), rgb(33, 123, 117).
Aa
White text reads best on this color (5.05:1).
About this color
#217B75 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 53%, its chroma 0.082 and its hue 188°. Its hue sits on the cool side of the wheel. The nearest named color is Bluegreen (#017A79), ΔE 0.012 away. White text reads best on it, at 5.05:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Bluegreen (#017A79) |
| Black text | 4.15:1 |
| White text | 5.05:1 |
Values
| HEX | #217B75 |
| RGB | rgb(33, 123, 117) |
| HSL | hsl(176, 58%, 31%) |
| OKLCH | oklch(53% 0.082 188.4) |
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 #217B75 | 5.05:1 | AA | Lc -80.0 | Fine for body text |
| Black text on #217B75 | 4.15:1 | AA large text | Lc 29.5 | Dividers and decoration only |
| #217B75 text on white | 5.05:1 | AA | Lc 74.6 | Content text, not long reading |
| #217B75 text on black | 4.15:1 | AA large text | Lc -27.1 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E2ECEB
oklch(93.5% 0.011 189.8)
-
Step 200
200
#CBDEDC
oklch(88.6% 0.02 189.2)
-
Step 300
300
#A6C9C5
oklch(80.9% 0.038 187.9)
-
Step 400
400
#75ADA8
oklch(70.7% 0.059 188.9)
-
Step 500
500
#4D9892
oklch(63% 0.075 188.6)
-
Step 600
600 (this color)
#217B75
oklch(53% 0.082 188.4)
-
Step 700
700
#1C6E69
oklch(49% 0.076 188.9)
-
Step 800
800
#1B5A56
oklch(42.7% 0.063 189.1)
-
Step 900
900
#1D4A47
oklch(37.7% 0.05 189.4)
-
Step 950
950
#132B29
oklch(26.9% 0.03 188.5)
#217B75 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) | #747475 | 0.087 |
| Deuteranopia (no green cones) | #676B76 | 0.081 |
| Tritanopia (no blue cones) | #007E79 | 0.012 |
| Achromatopsia (no color) | #6F6F6F | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #217B75
#217B75
oklch(53% 0.082 188.4)
- #945762
#945762
oklch(52.9% 0.082 8.6)
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 #217B75, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluegreen #017A79 ΔE 0.012
- Teal #008080 ΔE 0.019
- Deep Aqua #08787F ΔE 0.022
- Dark Aquamarine #017371 ΔE 0.029
- Deep Turquoise #017374 ΔE 0.029
- Ocean #017B92 ΔE 0.046
- Dark Cyan #008B8B ΔE 0.050
- Dark Aqua #05696B ΔE 0.059
Use #217B75 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.