#17637C
Closest named color: Petrol (#005F6A). oklch(46.7% 0.081 225.3), rgb(23, 99, 124).
Aa
White text reads best on this color (6.74:1).
About this color
#17637C is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 47%, its chroma 0.081 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.033 away. White text reads best on it, at 6.74:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 3.11:1 |
| White text | 6.74:1 |
Values
| HEX | #17637C |
| RGB | rgb(23, 99, 124) |
| HSL | hsl(195, 69%, 29%) |
| OKLCH | oklch(46.7% 0.081 225.3) |
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 #17637C | 6.74:1 | AA | Lc -87.9 | Fine for body text |
| Black text on #17637C | 3.11:1 | AA large text | Lc 21.1 | Dividers and decoration only |
| #17637C text on white | 6.74:1 | AA | Lc 82.9 | Fine for body text |
| #17637C text on black | 3.11:1 | AA large text | Lc -19.0 | 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 700.
-
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
#CBDCE4
oklch(88.4% 0.021 227.6)
-
Step 300
300
#A7C6D4
oklch(80.8% 0.039 226.9)
-
Step 400
400
#76A9BE
oklch(70.6% 0.062 225.6)
-
Step 500
500
#4F94AE
oklch(63.2% 0.08 224.9)
-
Step 600
600
#2F7E9A
oklch(55.7% 0.087 225.2)
-
Step 700
700 (this color)
#17637C
oklch(46.7% 0.081 225.3)
-
Step 800
800
#1E566B
oklch(42.6% 0.067 226.6)
-
Step 900
900
#1F4756
oklch(37.6% 0.052 225.3)
-
Step 950
950
#132A33
oklch(27.1% 0.033 225.6)
#17637C 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) | #55617D | 0.061 |
| Deuteranopia (no green cones) | #48577C | 0.054 |
| Tritanopia (no blue cones) | #006A6B | 0.042 |
| Achromatopsia (no color) | #5B5B5B | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17637C
#17637C
oklch(46.7% 0.081 225.3)
- #7F4B32
#7F4B32
oklch(46.8% 0.08 45.9)
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 #17637C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.033
- Dark Aqua #05696B ΔE 0.039
- Peacock Blue #016795 ΔE 0.040
- Light Navy Blue #2E5A88 ΔE 0.040
- YInMn Blue #415A77 ΔE 0.041
- Denim #3B638C ΔE 0.041
- Deep Sea Blue #015482 ΔE 0.053
- Deep Turquoise #017374 ΔE 0.056
Use #17637C 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.