#28657F
Closest named color: Denim (#3B638C). oklch(47.9% 0.075 229.4), rgb(40, 101, 127).
Aa
White text reads best on this color (6.44:1).
About this color
#28657F is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 48%, its chroma 0.075 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.030 away. White text reads best on it, at 6.44:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.25:1 |
| White text | 6.44:1 |
Values
| HEX | #28657F |
| RGB | rgb(40, 101, 127) |
| HSL | hsl(198, 52%, 33%) |
| OKLCH | oklch(47.9% 0.075 229.4) |
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 #28657F | 6.44:1 | AA | Lc -86.9 | Fine for body text |
| Black text on #28657F | 3.25:1 | AA large text | Lc 22.3 | Dividers and decoration only |
| #28657F text on white | 6.44:1 | AA | Lc 81.8 | Fine for body text |
| #28657F text on black | 3.25:1 | AA large text | Lc -20.1 | 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
#E3EBEF
oklch(93.5% 0.01 228.9)
-
Step 200
200
#CCDCE4
oklch(88.5% 0.02 229.1)
-
Step 300
300
#AAC6D4
oklch(81% 0.036 229.4)
-
Step 400
400
#7BA8BE
oklch(70.7% 0.058 229.7)
-
Step 500
500
#5792AD
oklch(63% 0.074 229.1)
-
Step 600
600
#3A7C99
oklch(55.6% 0.081 229.4)
-
Step 700
700 (this color)
#28657F
oklch(47.9% 0.075 229.4)
-
Step 800
800
#26556A
oklch(42.6% 0.062 229.8)
-
Step 900
900
#244656
oklch(37.6% 0.048 230.2)
-
Step 950
950
#162932
oklch(26.9% 0.03 229.7)
#28657F 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) | #586380 | 0.053 |
| Deuteranopia (no green cones) | #4C5B7F | 0.046 |
| Tritanopia (no blue cones) | #006C6E | 0.044 |
| Achromatopsia (no color) | #5E5E5E | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28657F
#28657F
oklch(47.9% 0.075 229.4)
- #7F5036
#7F5036
oklch(47.8% 0.074 49.2)
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 #28657F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.030
- Peacock Blue #016795 ΔE 0.037
- YInMn Blue #415A77 ΔE 0.037
- Light Navy Blue #2E5A88 ΔE 0.040
- Dark Aqua #05696B ΔE 0.043
- Petrol #005F6A ΔE 0.044
- Slate #516572 ΔE 0.046
- Sea Blue #047495 ΔE 0.049
Use #28657F 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.