#256559
Closest named color: Dark Green Blue (#1F6357). oklch(46.2% 0.068 178.7), rgb(37, 101, 89).
Aa
White text reads best on this color (6.80:1).
About this color
#256559 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 46%, its chroma 0.068 and its hue 179°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.008 away. White text reads best on it, at 6.80:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 3.08:1 |
| White text | 6.80:1 |
Values
| HEX | #256559 |
| RGB | rgb(37, 101, 89) |
| HSL | hsl(169, 46%, 27%) |
| OKLCH | oklch(46.2% 0.068 178.7) |
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 #256559 | 6.80:1 | AA | Lc -88.3 | Fine for body text |
| Black text on #256559 | 3.08:1 | AA large text | Lc 20.8 | Dividers and decoration only |
| #256559 text on white | 6.80:1 | AA | Lc 83.3 | Fine for body text |
| #256559 text on black | 3.08:1 | AA large text | Lc -18.7 | 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
#F2F6F5
oklch(97% 0.004 179.7)
-
Step 100
100
#E4ECEA
oklch(93.6% 0.009 179.6)
-
Step 200
200
#CDDDD9
oklch(88.4% 0.018 179.3)
-
Step 300
300
#ABC8C1
oklch(80.9% 0.033 179.2)
-
Step 400
400
#7DACA1
oklch(70.8% 0.053 178.6)
-
Step 500
500
#5A978A
oklch(63.1% 0.067 178.9)
-
Step 600
600
#3D8174
oklch(55.5% 0.072 179.3)
-
Step 700
700 (this color)
#256559
oklch(46.2% 0.068 178.7)
-
Step 800
800
#28594F
oklch(42.7% 0.056 178.3)
-
Step 900
900
#254942
oklch(37.6% 0.044 179.8)
-
Step 950
950
#172B27
oklch(27.1% 0.027 180)
#256559 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) | #615F59 | 0.072 |
| Deuteranopia (no green cones) | #57585A | 0.068 |
| Tritanopia (no blue cones) | #006761 | 0.017 |
| Achromatopsia (no color) | #5B5B5B | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256559
#256559
oklch(46.2% 0.068 178.7)
- #784858
#784858
oklch(46.2% 0.069 358.7)
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 #256559, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.008
- Dark Aqua #05696B ΔE 0.028
- Petrol #005F6A ΔE 0.042
- Dark Aquamarine #017371 ΔE 0.048
- Deep Turquoise #017374 ΔE 0.050
- Pine #2B5D34 ΔE 0.054
- Spruce #0A5F38 ΔE 0.055
- Deep Teal #00555A ΔE 0.060
Use #256559 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.