#31535F
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.1% 0.044 222.5), rgb(49, 83, 95).
Aa
White text reads best on this color (8.29:1).
About this color
#31535F is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.044 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.027 away. White text reads best on it, at 8.29:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.53:1 |
| White text | 8.29:1 |
Values
| HEX | #31535F |
| RGB | rgb(49, 83, 95) |
| HSL | hsl(196, 32%, 28%) |
| OKLCH | oklch(42.1% 0.044 222.5) |
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 #31535F | 8.29:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #31535F | 2.53:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #31535F text on white | 8.29:1 | AAA | Lc 88.5 | Fine for body text |
| #31535F text on black | 2.53:1 | Fails | Lc -13.6 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBED
oklch(93.6% 0.007 219.6)
-
Step 200
200
#CFDBE0
oklch(88.4% 0.015 224.5)
-
Step 300
300
#AFC5CD
oklch(80.9% 0.026 221.6)
-
Step 400
400
#85A7B3
oklch(70.7% 0.041 221.4)
-
Step 500
500
#6691A1
oklch(63.1% 0.053 223.1)
-
Step 600
600
#4C7B8C
oklch(55.6% 0.058 223)
-
Step 700
700
#3D6877
oklch(49.2% 0.053 222.4)
-
Step 800
800 (this color)
#31535F
oklch(42.1% 0.044 222.5)
-
Step 900
900
#2D464F
oklch(37.8% 0.034 222.5)
-
Step 950
950
#1B292E
oklch(27% 0.021 222)
#31535F 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) | #4C5160 | 0.036 |
| Deuteranopia (no green cones) | #454C5F | 0.032 |
| Tritanopia (no blue cones) | #1C5757 | 0.029 |
| Achromatopsia (no color) | #4E4E4E | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31535F
#31535F
oklch(42.1% 0.044 222.5)
- #63463A
#63463A
oklch(42.3% 0.045 43.4)
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 #31535F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.027
- Deep Teal #00555A ΔE 0.035
- Petrol #005F6A ΔE 0.042
- Dark Grey Blue #29465B ΔE 0.044
- Charcoal #264653 ΔE 0.046
- YInMn Blue #415A77 ΔE 0.048
- Dark Teal #014D4E ΔE 0.051
- Dark Blue Green #005249 ΔE 0.054
Use #31535F 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.