#317B71
Closest named color: Bluegreen (#017A79). oklch(53.4% 0.075 183.2), rgb(49, 123, 113).
Aa
White text reads best on this color (4.99:1).
About this color
#317B71 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 53%, its chroma 0.075 and its hue 183°. Its hue sits on the cool side of the wheel. The nearest named color is Bluegreen (#017A79), ΔE 0.023 away. White text reads best on it, at 4.99:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Bluegreen (#017A79) |
| Black text | 4.20:1 |
| White text | 4.99:1 |
Values
| HEX | #317B71 |
| RGB | rgb(49, 123, 113) |
| HSL | hsl(172, 43%, 34%) |
| OKLCH | oklch(53.4% 0.075 183.2) |
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 #317B71 | 4.99:1 | AA | Lc -79.7 | Fine for body text |
| Black text on #317B71 | 4.20:1 | AA large text | Lc 29.7 | Dividers and decoration only |
| #317B71 text on white | 4.99:1 | AA | Lc 74.3 | Content text, not long reading |
| #317B71 text on black | 4.20:1 | AA large text | Lc -27.4 | 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
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CCDDDA
oklch(88.4% 0.019 184.2)
-
Step 300
300
#AAC8C3
oklch(80.9% 0.033 184.4)
-
Step 400
400
#7BACA4
oklch(70.7% 0.053 183.6)
-
Step 500
500
#56978D
oklch(63% 0.069 183.1)
-
Step 600
600 (this color)
#317B71
oklch(53.4% 0.075 183.2)
-
Step 700
700
#2A6E64
oklch(49.2% 0.07 182.1)
-
Step 800
800
#245952
oklch(42.6% 0.058 183.7)
-
Step 900
900
#234944
oklch(37.6% 0.044 184.5)
-
Step 950
950
#152B28
oklch(27% 0.029 184.5)
#317B71 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) | #757471 | 0.079 |
| Deuteranopia (no green cones) | #6A6C72 | 0.075 |
| Tritanopia (no blue cones) | #007D78 | 0.020 |
| Achromatopsia (no color) | #6F6F6F | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #317B71
#317B71
oklch(53.4% 0.075 183.2)
- #915A68
#915A68
oklch(53.3% 0.074 3.4)
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 #317B71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluegreen #017A79 ΔE 0.023
- Teal #008080 ΔE 0.026
- Deep Aqua #08787F ΔE 0.031
- Dark Aquamarine #017371 ΔE 0.036
- Deep Turquoise #017374 ΔE 0.037
- Dark Cyan #008B8B ΔE 0.052
- Ocean #017B92 ΔE 0.054
- Dark Aqua #05696B ΔE 0.064
Use #317B71 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.