#306E78
Closest named color: Deep Turquoise (#017374). oklch(50.2% 0.065 209.5), rgb(48, 110, 120).
Aa
White text reads best on this color (5.78:1).
About this color
#306E78 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 50%, its chroma 0.065 and its hue 209°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Turquoise (#017374), ΔE 0.027 away. White text reads best on it, at 5.78:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (50%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Deep Turquoise (#017374) |
| Black text | 3.62:1 |
| White text | 5.78:1 |
Values
| HEX | #306E78 |
| RGB | rgb(48, 110, 120) |
| HSL | hsl(188, 43%, 33%) |
| OKLCH | oklch(50.2% 0.065 209.5) |
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 #306E78 | 5.78:1 | AA | Lc -84.0 | Fine for body text |
| Black text on #306E78 | 3.62:1 | AA large text | Lc 25.3 | Dividers and decoration only |
| #306E78 text on white | 5.78:1 | AA | Lc 78.8 | Fine for body text |
| #306E78 text on black | 3.62:1 | AA large text | Lc -23.0 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CDDDDF
oklch(88.6% 0.017 205.8)
-
Step 300
300
#AAC7CC
oklch(81% 0.032 209.2)
-
Step 400
400
#7CAAB2
oklch(70.8% 0.05 209.4)
-
Step 500
500
#58949F
oklch(63% 0.064 210.5)
-
Step 600
600
#3B7F8A
oklch(55.7% 0.07 209.4)
-
Step 700
700 (this color)
#306E78
oklch(50.2% 0.065 209.5)
-
Step 800
800
#26575F
oklch(42.6% 0.054 209.5)
-
Step 900
900
#24484E
oklch(37.7% 0.043 209.4)
-
Step 950
950
#162A2E
oklch(27% 0.027 211.7)
#306E78 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) | #656A79 | 0.062 |
| Deuteranopia (no green cones) | #5A6278 | 0.057 |
| Tritanopia (no blue cones) | #007371 | 0.030 |
| Achromatopsia (no color) | #656565 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306E78
#306E78
oklch(50.2% 0.065 209.5)
- #85554E
#85554E
oklch(50.1% 0.066 28.7)
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 #306E78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Turquoise #017374 ΔE 0.027
- Dark Aquamarine #017371 ΔE 0.030
- Deep Aqua #08787F ΔE 0.031
- Dark Aqua #05696B ΔE 0.036
- Bluegreen #017A79 ΔE 0.039
- Slate #516572 ΔE 0.040
- Sea Blue #047495 ΔE 0.046
- Ocean #017B92 ΔE 0.048
Use #306E78 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.