#31687F
Closest named color: Denim (#3B638C). oklch(49% 0.069 228), rgb(49, 104, 127).
Aa
White text reads best on this color (6.14:1).
About this color
#31687F is a medium-dark, muted teal or cyan. In OKLCH its lightness is 49%, its chroma 0.069 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.031 away. White text reads best on it, at 6.14:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.41:1 |
| White text | 6.14:1 |
Values
| HEX | #31687F |
| RGB | rgb(49, 104, 127) |
| HSL | hsl(198, 44%, 35%) |
| OKLCH | oklch(49% 0.069 228) |
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 #31687F | 6.14:1 | AA | Lc -85.7 | Fine for body text |
| Black text on #31687F | 3.41:1 | AA large text | Lc 23.6 | Dividers and decoration only |
| #31687F text on white | 6.14:1 | AA | Lc 80.5 | Fine for body text |
| #31687F text on black | 3.41:1 | AA large text | Lc -21.4 | 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 700.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CDDCE3
oklch(88.5% 0.019 227.3)
-
Step 300
300
#ABC5D2
oklch(80.8% 0.034 229.4)
-
Step 400
400
#7EA8BB
oklch(70.8% 0.053 227.5)
-
Step 500
500
#5C92AA
oklch(63.2% 0.068 228)
-
Step 600
600
#407C95
oklch(55.6% 0.073 227.5)
-
Step 700
700 (this color)
#31687F
oklch(49% 0.069 228)
-
Step 800
800
#2A5567
oklch(42.7% 0.056 227.6)
-
Step 900
900
#274654
oklch(37.6% 0.044 228.8)
-
Step 950
950
#172931
oklch(26.9% 0.028 227.9)
#31687F 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) | #5C6680 | 0.050 |
| Deuteranopia (no green cones) | #515E7F | 0.044 |
| Tritanopia (no blue cones) | #006F6F | 0.046 |
| Achromatopsia (no color) | #626262 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31687F
#31687F
oklch(49% 0.069 228)
- #80543D
#80543D
oklch(48.9% 0.068 48.2)
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 #31687F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.031
- Slate #516572 ΔE 0.038
- Peacock Blue #016795 ΔE 0.042
- YInMn Blue #415A77 ΔE 0.042
- Sea Blue #047495 ΔE 0.044
- Dark Aqua #05696B ΔE 0.044
- Deep Turquoise #017374 ΔE 0.048
- Ocean Blue #03719C ΔE 0.048
Use #31687F 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.