#33666C
Closest named color: Dark Aqua (#05696B). oklch(47.7% 0.055 205.5), rgb(51, 102, 108).
Aa
White text reads best on this color (6.44:1).
About this color
#33666C is a medium-dark, muted teal or cyan. In OKLCH its lightness is 48%, its chroma 0.055 and its hue 205°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aqua (#05696B), ΔE 0.026 away. White text reads best on it, at 6.44:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Dark Aqua (#05696B) |
| Black text | 3.25:1 |
| White text | 6.44:1 |
Values
| HEX | #33666C |
| RGB | rgb(51, 102, 108) |
| HSL | hsl(186, 36%, 31%) |
| OKLCH | oklch(47.7% 0.055 205.5) |
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 #33666C | 6.44:1 | AA | Lc -87.0 | Fine for body text |
| Black text on #33666C | 3.25:1 | AA large text | Lc 22.2 | Dividers and decoration only |
| #33666C text on white | 6.44:1 | AA | Lc 81.9 | Fine for body text |
| #33666C text on black | 3.25:1 | AA large text | Lc -20.0 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E4EBEC
oklch(93.5% 0.008 207.1)
-
Step 200
200
#CEDCDE
oklch(88.4% 0.015 207.1)
-
Step 300
300
#ADC6C9
oklch(80.9% 0.027 205.4)
-
Step 400
400
#82A9AE
oklch(70.8% 0.043 206)
-
Step 500
500
#61939A
oklch(63% 0.054 207)
-
Step 600
600
#467E84
oklch(55.7% 0.06 204.5)
-
Step 700
700 (this color)
#33666C
oklch(47.7% 0.055 205.5)
-
Step 800
800
#2E565B
oklch(42.6% 0.046 206)
-
Step 900
900
#2A474B
oklch(37.7% 0.035 206.9)
-
Step 950
950
#192A2C
oklch(27.1% 0.023 205.2)
#33666C 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) | #5F626C | 0.055 |
| Deuteranopia (no green cones) | #565B6C | 0.052 |
| Tritanopia (no blue cones) | #0E6A68 | 0.027 |
| Achromatopsia (no color) | #5E5E5E | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33666C
#33666C
oklch(47.7% 0.055 205.5)
- #79514D
#79514D
oklch(47.8% 0.055 25.6)
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 #33666C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aqua #05696B ΔE 0.026
- Slate #516572 ΔE 0.037
- Petrol #005F6A ΔE 0.039
- Dark Green Blue #1F6357 ΔE 0.040
- Deep Turquoise #017374 ΔE 0.041
- Dark Aquamarine #017371 ΔE 0.042
- YInMn Blue #415A77 ΔE 0.048
- Deep Aqua #08787F ΔE 0.055
Use #33666C 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.