#255D73
Closest named color: Petrol (#005F6A). oklch(45.1% 0.068 227.2), rgb(37, 93, 115).
Aa
White text reads best on this color (7.26:1).
About this color
#255D73 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 45%, its chroma 0.068 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.026 away. White text reads best on it, at 7.26:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.89:1 |
| White text | 7.26:1 |
Values
| HEX | #255D73 |
| RGB | rgb(37, 93, 115) |
| HSL | hsl(197, 51%, 30%) |
| OKLCH | oklch(45.1% 0.068 227.2) |
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 #255D73 | 7.26:1 | AAA | Lc -89.9 | Fine for body text |
| Black text on #255D73 | 2.89:1 | Fails | Lc 19.0 | Dividers and decoration only |
| #255D73 text on white | 7.26:1 | AAA | Lc 85.0 | Fine for body text |
| #255D73 text on black | 2.89:1 | Fails | Lc -17.0 | 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 800.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CBDCE5
oklch(88.4% 0.022 230.6)
-
Step 300
300
#A7C6D5
oklch(80.9% 0.04 228.7)
-
Step 400
400
#76A9C0
oklch(70.7% 0.064 227.8)
-
Step 500
500
#4F93B0
oklch(63% 0.082 227.9)
-
Step 600
600
#2E7D9C
oklch(55.5% 0.089 227.9)
-
Step 700
700
#206A85
oklch(49.2% 0.082 226.8)
-
Step 800
800 (this color)
#255D73
oklch(45.1% 0.068 227.2)
-
Step 900
900
#1F4758
oklch(37.7% 0.053 228.4)
-
Step 950
950
#132A33
oklch(27.1% 0.033 225.6)
#255D73 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) | #515B74 | 0.050 |
| Deuteranopia (no green cones) | #465373 | 0.044 |
| Tritanopia (no blue cones) | #006364 | 0.040 |
| Achromatopsia (no color) | #575757 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255D73
#255D73
oklch(45.1% 0.068 227.2)
- #754934
#754934
oklch(45.1% 0.069 46)
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 #255D73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.026
- YInMn Blue #415A77 ΔE 0.031
- Light Navy Blue #2E5A88 ΔE 0.040
- Dark Aqua #05696B ΔE 0.045
- Deep Sea Blue #015482 ΔE 0.047
- Denim #3B638C ΔE 0.049
- Deep Teal #00555A ΔE 0.052
- Peacock Blue #016795 ΔE 0.056
Use #255D73 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.