#306570
Closest named color: Dark Aqua (#05696B). oklch(47.5% 0.059 213), rgb(48, 101, 112).
Aa
White text reads best on this color (6.51:1).
About this color
#306570 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 48%, its chroma 0.059 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aqua (#05696B), ΔE 0.028 away. White text reads best on it, at 6.51:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Dark Aqua (#05696B) |
| Black text | 3.22:1 |
| White text | 6.51:1 |
Values
| HEX | #306570 |
| RGB | rgb(48, 101, 112) |
| HSL | hsl(190, 40%, 31%) |
| OKLCH | oklch(47.5% 0.059 213) |
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 #306570 | 6.51:1 | AA | Lc -87.2 | Fine for body text |
| Black text on #306570 | 3.22:1 | AA large text | Lc 21.9 | Dividers and decoration only |
| #306570 text on white | 6.51:1 | AA | Lc 82.2 | Fine for body text |
| #306570 text on black | 3.22:1 | AA large text | Lc -19.7 | 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 700.
-
Step 50
50
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBED
oklch(93.5% 0.008 216.6)
-
Step 200
200
#CEDCDF
oklch(88.5% 0.016 212)
-
Step 300
300
#ADC6CC
oklch(81% 0.028 213.8)
-
Step 400
400
#80A9B2
oklch(70.8% 0.046 212.6)
-
Step 500
500
#5F939F
oklch(63.1% 0.058 213.9)
-
Step 600
600
#437D89
oklch(55.5% 0.063 212.6)
-
Step 700
700 (this color)
#306570
oklch(47.5% 0.059 213)
-
Step 800
800
#2C565F
oklch(42.7% 0.049 213.2)
-
Step 900
900
#28474E
oklch(37.7% 0.039 213.7)
-
Step 950
950
#182A2D
oklch(27.1% 0.024 209.1)
#306570 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) | #5D6271 | 0.055 |
| Deuteranopia (no green cones) | #535B70 | 0.049 |
| Tritanopia (no blue cones) | #006A68 | 0.033 |
| Achromatopsia (no color) | #5E5E5E | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306570
#306570
oklch(47.5% 0.059 213)
- #7A5047
#7A5047
oklch(47.5% 0.059 32.6)
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 #306570, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aqua #05696B ΔE 0.028
- Petrol #005F6A ΔE 0.036
- Slate #516572 ΔE 0.038
- YInMn Blue #415A77 ΔE 0.042
- Deep Turquoise #017374 ΔE 0.044
- Dark Green Blue #1F6357 ΔE 0.045
- Dark Aquamarine #017371 ΔE 0.046
- Denim #3B638C ΔE 0.051
Use #306570 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.