#256259
Closest named color: Dark Green Blue (#1F6357). oklch(45.4% 0.064 182.1), rgb(37, 98, 89).
Aa
White text reads best on this color (7.07:1).
About this color
#256259 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 45%, its chroma 0.064 and its hue 182°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.007 away. White text reads best on it, at 7.07:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.96:1 |
| White text | 7.07:1 |
Values
| HEX | #256259 |
| RGB | rgb(37, 98, 89) |
| HSL | hsl(171, 45%, 26%) |
| OKLCH | oklch(45.4% 0.064 182.1) |
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 #256259 | 7.07:1 | AAA | Lc -89.2 | Fine for body text |
| Black text on #256259 | 2.96:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #256259 text on white | 7.07:1 | AAA | Lc 84.3 | Fine for body text |
| #256259 text on black | 2.96:1 | Fails | Lc -17.7 | 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 800.
-
Step 50
50
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E2ECEA
oklch(93.5% 0.011 182.9)
-
Step 200
200
#CBDEDA
oklch(88.5% 0.021 181.8)
-
Step 300
300
#A7C9C2
oklch(80.9% 0.038 181.5)
-
Step 400
400
#76ADA3
oklch(70.6% 0.06 181.9)
-
Step 500
500
#4E998D
oklch(63.1% 0.077 182.1)
-
Step 600
600
#2D8377
oklch(55.5% 0.083 182.3)
-
Step 700
700
#1E6F64
oklch(49.1% 0.078 182)
-
Step 800
800 (this color)
#256259
oklch(45.4% 0.064 182.1)
-
Step 900
900
#1E4A44
oklch(37.6% 0.05 183.5)
-
Step 950
950
#132C28
oklch(27.2% 0.032 182.2)
#256259 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) | #5E5C59 | 0.069 |
| Deuteranopia (no green cones) | #54565A | 0.064 |
| Tritanopia (no blue cones) | #00645F | 0.017 |
| Achromatopsia (no color) | #585858 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256259
#256259
oklch(45.4% 0.064 182.1)
- #744753
#744753
oklch(45.4% 0.064 2.6)
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 #256259, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.007
- Dark Aqua #05696B ΔE 0.031
- Petrol #005F6A ΔE 0.036
- Deep Teal #00555A ΔE 0.050
- Pine #2B5D34 ΔE 0.054
- Dark Aquamarine #017371 ΔE 0.055
- Spruce #0A5F38 ΔE 0.055
- Deep Turquoise #017374 ΔE 0.057
Use #256259 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.