#40717C
Closest named color: Deep Aqua (#08787F). oklch(51.8% 0.056 213.8), rgb(64, 113, 124).
Aa
White text reads best on this color (5.42:1).
About this color
#40717C is a medium-dark, muted teal or cyan. In OKLCH its lightness is 52%, its chroma 0.056 and its hue 214°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Aqua (#08787F), ΔE 0.035 away. White text reads best on it, at 5.42:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Deep Aqua (#08787F) |
| Black text | 3.87:1 |
| White text | 5.42:1 |
Values
| HEX | #40717C |
| RGB | rgb(64, 113, 124) |
| HSL | hsl(191, 32%, 37%) |
| OKLCH | oklch(51.8% 0.056 213.8) |
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 #40717C | 5.42:1 | AA | Lc -82.3 | Fine for body text |
| Black text on #40717C | 3.87:1 | AA large text | Lc 27.1 | Dividers and decoration only |
| #40717C text on white | 5.42:1 | AA | Lc 76.9 | Fine for body text |
| #40717C text on black | 3.87:1 | AA large text | Lc -24.8 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBED
oklch(93.5% 0.008 216.6)
-
Step 200
200
#CFDCDF
oklch(88.6% 0.015 213.1)
-
Step 300
300
#AEC6CB
oklch(81% 0.027 211.6)
-
Step 400
400
#82A8B1
oklch(70.7% 0.043 213.8)
-
Step 500
500
#62939E
oklch(63.2% 0.055 213.3)
-
Step 600
600
#477D89
oklch(55.7% 0.06 213.6)
-
Step 700
700 (this color)
#40717C
oklch(51.8% 0.056 213.8)
-
Step 800
800
#2F565E
oklch(42.8% 0.046 212.3)
-
Step 900
900
#2A474D
oklch(37.8% 0.036 212.2)
-
Step 950
950
#19292D
oklch(26.9% 0.023 215.1)
#40717C 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) | #696E7D | 0.052 |
| Deuteranopia (no green cones) | #5F677C | 0.046 |
| Tritanopia (no blue cones) | #227574 | 0.031 |
| Achromatopsia (no color) | #6A6A6A | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40717C
#40717C
oklch(51.8% 0.056 213.8)
- #855D53
#855D53
oklch(51.8% 0.055 34.6)
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 #40717C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Aqua #08787F ΔE 0.035
- Metallic Blue #4F738E ΔE 0.035
- Slate #516572 ΔE 0.037
- Deep Turquoise #017374 ΔE 0.040
- Bluegreen #017A79 ΔE 0.042
- Dark Aquamarine #017371 ΔE 0.043
- Ocean #017B92 ΔE 0.045
- Sea Blue #047495 ΔE 0.047
Use #40717C 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.