#2B728B
Closest named color: Sea Blue (#047495). oklch(51.9% 0.08 224.9), rgb(43, 114, 139).
Aa
White text reads best on this color (5.40:1).
About this color
#2B728B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 52%, its chroma 0.080 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.020 away. White text reads best on it, at 5.40:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.88:1 |
| White text | 5.40:1 |
Values
| HEX | #2B728B |
| RGB | rgb(43, 114, 139) |
| HSL | hsl(196, 53%, 36%) |
| OKLCH | oklch(51.9% 0.08 224.9) |
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 #2B728B | 5.40:1 | AA | Lc -82.0 | Fine for body text |
| Black text on #2B728B | 3.88:1 | AA large text | Lc 27.4 | Dividers and decoration only |
| #2B728B text on white | 5.40:1 | AA | Lc 76.7 | Fine for body text |
| #2B728B text on black | 3.88:1 | AA large text | Lc -25.0 | 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 700.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECEF
oklch(93.6% 0.011 217.5)
-
Step 200
200
#CBDCE4
oklch(88.4% 0.021 227.6)
-
Step 300
300
#A7C6D4
oklch(80.8% 0.039 226.9)
-
Step 400
400
#76A9BE
oklch(70.6% 0.062 225.6)
-
Step 500
500
#5094AD
oklch(63.2% 0.078 224.2)
-
Step 600
600
#307E99
oklch(55.7% 0.086 224.6)
-
Step 700
700 (this color)
#2B728B
oklch(51.9% 0.08 224.9)
-
Step 800
800
#1E566A
oklch(42.6% 0.066 225.4)
-
Step 900
900
#1F4756
oklch(37.6% 0.052 225.3)
-
Step 950
950
#132A32
oklch(27% 0.033 222.8)
#2B728B 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) | #64708C | 0.061 |
| Deuteranopia (no green cones) | #57668B | 0.054 |
| Tritanopia (no blue cones) | #00797A | 0.044 |
| Achromatopsia (no color) | #6A6A6A | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B728B
#2B728B
oklch(51.9% 0.08 224.9)
- #8F5941
#8F5941
oklch(51.9% 0.08 44.5)
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 #2B728B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.020
- Ocean #017B92 ΔE 0.028
- Ocean Blue #03719C ΔE 0.031
- Deep Aqua #08787F ΔE 0.034
- Metallic Blue #4F738E ΔE 0.035
- Muted Blue #3B719F ΔE 0.037
- Dull Blue #49759C ΔE 0.041
- Deep Turquoise #017374 ΔE 0.045
Use #2B728B 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.