#307B81
Closest named color: Deep Aqua (#08787F). oklch(53.9% 0.073 202.5), rgb(48, 123, 129).
Aa
White text reads best on this color (4.91:1).
About this color
#307B81 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 54%, its chroma 0.073 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Aqua (#08787F), ΔE 0.022 away. White text reads best on it, at 4.91:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Deep Aqua (#08787F) |
| Black text | 4.27:1 |
| White text | 4.91:1 |
Values
| HEX | #307B81 |
| RGB | rgb(48, 123, 129) |
| HSL | hsl(184, 46%, 35%) |
| OKLCH | oklch(53.9% 0.073 202.5) |
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 #307B81 | 4.91:1 | AA | Lc -79.2 | Fine for body text |
| Black text on #307B81 | 4.27:1 | AA large text | Lc 30.3 | Non-text elements, placeholder text |
| #307B81 text on white | 4.91:1 | AA | Lc 73.8 | Content text, not long reading |
| #307B81 text on black | 4.27:1 | AA large text | Lc -27.9 | 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 600.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECEC
oklch(93.6% 0.01 197)
-
Step 200
200
#CCDDDE
oklch(88.5% 0.018 201.1)
-
Step 300
300
#A9C7CA
oklch(80.8% 0.033 203.9)
-
Step 400
400
#79ABAF
oklch(70.7% 0.053 202.3)
-
Step 500
500
#54969B
oklch(63.1% 0.068 201.9)
-
Step 600
600 (this color)
#307B81
oklch(53.9% 0.073 202.5)
-
Step 700
700
#276C72
oklch(49.1% 0.068 203.2)
-
Step 800
800
#22585C
oklch(42.6% 0.057 202)
-
Step 900
900
#22494C
oklch(37.8% 0.044 202.1)
-
Step 950
950
#152B2C
oklch(27.1% 0.028 199.4)
#307B81 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) | #727681 | 0.074 |
| Deuteranopia (no green cones) | #656D81 | 0.067 |
| Tritanopia (no blue cones) | #00807D | 0.025 |
| Achromatopsia (no color) | #717171 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #307B81
#307B81
oklch(53.9% 0.073 202.5)
- #955D5B
#955D5B
oklch(54% 0.074 22)
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 #307B81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Aqua #08787F ΔE 0.022
- Teal #008080 ΔE 0.023
- Bluegreen #017A79 ΔE 0.025
- Ocean #017B92 ΔE 0.031
- Deep Turquoise #017374 ΔE 0.039
- Dark Aquamarine #017371 ΔE 0.041
- Metallic Blue #4F738E ΔE 0.046
- Dark Cyan #008B8B ΔE 0.046
Use #307B81 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.