#2D5566
Closest named color: Petrol (#005F6A). oklch(42.8% 0.053 227.6), rgb(45, 85, 102).
Aa
White text reads best on this color (8.06:1).
About this color
#2D5566 is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.053 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.036 away. White text reads best on it, at 8.06:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.60:1 |
| White text | 8.06:1 |
Values
| HEX | #2D5566 |
| RGB | rgb(45, 85, 102) |
| HSL | hsl(198, 39%, 29%) |
| OKLCH | oklch(42.8% 0.053 227.6) |
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 #2D5566 | 8.06:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #2D5566 | 2.60:1 | Fails | Lc 16.2 | Dividers and decoration only |
| #2D5566 text on white | 8.06:1 | AAA | Lc 87.8 | Fine for body text |
| #2D5566 text on black | 2.60:1 | Fails | Lc -14.3 | Not readable |
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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CEDCE2
oklch(88.6% 0.017 225.2)
-
Step 300
300
#ADC5D1
oklch(80.9% 0.031 229.3)
-
Step 400
400
#80A7B9
oklch(70.6% 0.05 227.9)
-
Step 500
500
#5F91A8
oklch(63% 0.064 228.7)
-
Step 600
600
#447B93
oklch(55.5% 0.069 228.2)
-
Step 700
700
#35687D
oklch(49.1% 0.064 227.1)
-
Step 800
800 (this color)
#2D5566
oklch(42.8% 0.053 227.6)
-
Step 900
900
#294653
oklch(37.7% 0.041 228.3)
-
Step 950
950
#182931
oklch(27% 0.027 229.2)
#2D5566 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) | #4C5467 | 0.039 |
| Deuteranopia (no green cones) | #444D66 | 0.036 |
| Tritanopia (no blue cones) | #075A5A | 0.039 |
| Achromatopsia (no color) | #505050 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D5566
#2D5566
oklch(42.8% 0.053 227.6)
- #674635
#674635
oklch(42.7% 0.053 48.1)
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 #2D5566, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.036
- Deep Teal #00555A ΔE 0.037
- Dark Slate Gray #2F4F4F ΔE 0.038
- YInMn Blue #415A77 ΔE 0.040
- Dark Grey Blue #29465B ΔE 0.048
- Deep Sea Blue #015482 ΔE 0.053
- Charcoal #264653 ΔE 0.053
- Light Navy Blue #2E5A88 ΔE 0.056
Use #2D5566 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.