#2D5666
Closest named color: Petrol (#005F6A). oklch(43% 0.053 225.5), rgb(45, 86, 102).
Aa
White text reads best on this color (7.97:1).
About this color
#2D5666 is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.053 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.033 away. White text reads best on it, at 7.97:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.63:1 |
| White text | 7.97:1 |
Values
| HEX | #2D5666 |
| RGB | rgb(45, 86, 102) |
| HSL | hsl(197, 39%, 29%) |
| OKLCH | oklch(43% 0.053 225.5) |
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 #2D5666 | 7.97:1 | AAA | Lc -92.2 | Preferred for body text |
| Black text on #2D5666 | 2.63:1 | Fails | Lc 16.5 | Dividers and decoration only |
| #2D5666 text on white | 7.97:1 | AAA | Lc 87.5 | Fine for body text |
| #2D5666 text on black | 2.63:1 | Fails | Lc -14.6 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBEE
oklch(93.6% 0.009 225.1)
-
Step 200
200
#CEDCE2
oklch(88.6% 0.017 225.2)
-
Step 300
300
#ACC5D0
oklch(80.8% 0.031 226.1)
-
Step 400
400
#80A8B8
oklch(70.8% 0.049 224.4)
-
Step 500
500
#5E92A7
oklch(63.1% 0.064 225.5)
-
Step 600
600
#437C92
oklch(55.6% 0.069 225.3)
-
Step 700
700
#34687C
oklch(49% 0.064 225.5)
-
Step 800
800 (this color)
#2D5666
oklch(43% 0.053 225.5)
-
Step 900
900
#284652
oklch(37.6% 0.041 225.6)
-
Step 950
950
#182930
oklch(26.9% 0.026 225.8)
#2D5666 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) | #4D5467 | 0.041 |
| Deuteranopia (no green cones) | #454E66 | 0.037 |
| Tritanopia (no blue cones) | #075B5B | 0.037 |
| Achromatopsia (no color) | #515151 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D5666
#2D5666
oklch(43% 0.053 225.5)
- #684737
#684737
oklch(43% 0.052 46.8)
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 #2D5666, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.033
- Deep Teal #00555A ΔE 0.037
- Dark Slate Gray #2F4F4F ΔE 0.039
- YInMn Blue #415A77 ΔE 0.039
- Dark Grey Blue #29465B ΔE 0.051
- Deep Sea Blue #015482 ΔE 0.054
- Charcoal #264653 ΔE 0.056
- Light Navy Blue #2E5A88 ΔE 0.056
Use #2D5666 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.