#256171
Closest named color: Petrol (#005F6A). oklch(46.1% 0.066 218.4), rgb(37, 97, 113).
Aa
White text reads best on this color (6.93:1).
About this color
#256171 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 46%, its chroma 0.066 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.023 away. White text reads best on it, at 6.93:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 3.02:1 |
| White text | 6.93:1 |
Values
| HEX | #256171 |
| RGB | rgb(37, 97, 113) |
| HSL | hsl(193, 51%, 29%) |
| OKLCH | oklch(46.1% 0.066 218.4) |
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 #256171 | 6.93:1 | AA | Lc -88.8 | Fine for body text |
| Black text on #256171 | 3.02:1 | AA large text | Lc 20.3 | Dividers and decoration only |
| #256171 text on white | 6.93:1 | AA | Lc 83.8 | Fine for body text |
| #256171 text on black | 3.02:1 | AA large text | Lc -18.2 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3EBEE
oklch(93.5% 0.009 222.1)
-
Step 200
200
#CDDCE1
oklch(88.5% 0.018 219.7)
-
Step 300
300
#ABC6CF
oklch(80.9% 0.032 219.9)
-
Step 400
400
#7DA9B6
oklch(70.8% 0.051 218)
-
Step 500
500
#5A93A4
oklch(63% 0.065 218.9)
-
Step 600
600
#3D7D8F
oklch(55.5% 0.071 218.6)
-
Step 700
700 (this color)
#256171
oklch(46.1% 0.066 218.4)
-
Step 800
800
#285663
oklch(42.6% 0.055 218.7)
-
Step 900
900
#254751
oklch(37.7% 0.043 219)
-
Step 950
950
#172A2F
oklch(27.1% 0.026 216.3)
#256171 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) | #575E72 | 0.057 |
| Deuteranopia (no green cones) | #4C5671 | 0.051 |
| Tritanopia (no blue cones) | #006666 | 0.032 |
| Achromatopsia (no color) | #5A5A5A | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256171
#256171
oklch(46.1% 0.066 218.4)
- #784B3D
#784B3D
oklch(46.1% 0.066 38)
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 #256171, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.023
- Dark Aqua #05696B ΔE 0.032
- YInMn Blue #415A77 ΔE 0.037
- Dark Green Blue #1F6357 ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.050
- Slate #516572 ΔE 0.051
- Denim #3B638C ΔE 0.051
- Deep Teal #00555A ΔE 0.055
Use #256171 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.