#2B505E
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41% 0.048 224.6), rgb(43, 80, 94).
Aa
White text reads best on this color (8.70:1).
About this color
#2B505E is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.048 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.025 away. White text reads best on it, at 8.70:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.41:1 |
| White text | 8.70:1 |
Values
| HEX | #2B505E |
| RGB | rgb(43, 80, 94) |
| HSL | hsl(196, 37%, 27%) |
| OKLCH | oklch(41% 0.048 224.6) |
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 #2B505E | 8.70:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #2B505E | 2.41:1 | Fails | Lc 14.2 | Not readable |
| #2B505E text on white | 8.70:1 | AAA | Lc 89.7 | Fine for body text |
| #2B505E text on black | 2.41:1 | Fails | Lc -12.5 | 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
#CFDCE1
oklch(88.6% 0.016 222.7)
-
Step 300
300
#AEC5CE
oklch(80.9% 0.028 223.3)
-
Step 400
400
#83A7B6
oklch(70.7% 0.045 225.3)
-
Step 500
500
#6291A4
oklch(63% 0.058 225.3)
-
Step 600
600
#487B8F
oklch(55.5% 0.063 225.2)
-
Step 700
700
#39687A
oklch(49.1% 0.059 224.9)
-
Step 800
800 (this color)
#2B505E
oklch(41% 0.048 224.6)
-
Step 900
900
#2B4651
oklch(37.7% 0.038 225.7)
-
Step 950
950
#19292F
oklch(26.9% 0.024 223.4)
#2B505E 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) | #484E5F | 0.038 |
| Deuteranopia (no green cones) | #41495E | 0.034 |
| Tritanopia (no blue cones) | #0D5454 | 0.033 |
| Achromatopsia (no color) | #4B4B4B | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B505E
#2B505E
oklch(41% 0.048 224.6)
- #614234
#614234
oklch(41% 0.049 45.2)
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 #2B505E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.025
- Deep Teal #00555A ΔE 0.031
- Dark Grey Blue #29465B ΔE 0.032
- Charcoal #264653 ΔE 0.035
- Dark Teal #014D4E ΔE 0.043
- Petrol #005F6A ΔE 0.048
- Dark Blue Green #005249 ΔE 0.050
- YInMn Blue #415A77 ΔE 0.057
Use #2B505E 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.