#31504D
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.6% 0.037 188.1), rgb(49, 80, 77).
Aa
White text reads best on this color (8.80:1).
About this color
#31504D is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.037 and its hue 188°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.006 away. White text reads best on it, at 8.80:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.38:1 |
| White text | 8.80:1 |
Values
| HEX | #31504D |
| RGB | rgb(49, 80, 77) |
| HSL | hsl(174, 24%, 25%) |
| OKLCH | oklch(40.6% 0.037 188.1) |
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 #31504D | 8.80:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #31504D | 2.38:1 | Fails | Lc 13.9 | Not readable |
| #31504D text on white | 8.80:1 | AAA | Lc 90.1 | Preferred for body text |
| #31504D text on black | 2.38:1 | Fails | Lc -12.2 | Not readable |
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 800.
-
Step 50
50
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEA
oklch(93.5% 0.007 185.3)
-
Step 200
200
#D1DCDA
oklch(88.6% 0.012 184)
-
Step 300
300
#B2C5C3
oklch(80.8% 0.021 189.1)
-
Step 400
400
#89A8A4
oklch(70.7% 0.035 186.8)
-
Step 500
500
#6B938E
oklch(63.2% 0.045 186.5)
-
Step 600
600
#527D78
oklch(55.7% 0.048 186.7)
-
Step 700
700
#426965
oklch(49% 0.045 187.6)
-
Step 800
800 (this color)
#31504D
oklch(40.6% 0.037 188.1)
-
Step 900
900
#304744
oklch(37.8% 0.029 185.9)
-
Step 950
950
#1C2928
oklch(26.9% 0.018 190.2)
#31504D 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) | #4D4D4D | 0.040 |
| Deuteranopia (no green cones) | #47494D | 0.036 |
| Tritanopia (no blue cones) | #26514F | 0.011 |
| Achromatopsia (no color) | #4A4A4A | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31504D
#31504D
oklch(40.6% 0.037 188.1)
- #5B4145
#5B4145
oklch(40.5% 0.037 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 #31504D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.006
- Deep Teal #00555A ΔE 0.035
- Dark Blue Green #005249 ΔE 0.036
- Dark Teal #014D4E ΔE 0.038
- Charcoal #264653 ΔE 0.041
- Charcoal Grey #3C4142 ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.048
- Petrol #005F6A ΔE 0.058
Use #31504D 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.