#307E8F
Closest named color: Ocean (#017B92). oklch(55.3% 0.079 214.7), rgb(48, 126, 143).
Aa
White text reads best on this color (4.65:1).
About this color
#307E8F is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 55%, its chroma 0.079 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.023 away. White text reads best on it, at 4.65:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.50:1 |
| White text | 4.65:1 |
Values
| HEX | #307E8F |
| RGB | rgb(48, 126, 143) |
| HSL | hsl(191, 50%, 37%) |
| OKLCH | oklch(55.3% 0.079 214.7) |
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 #307E8F | 4.65:1 | AA | Lc -77.6 | Fine for body text |
| Black text on #307E8F | 4.50:1 | AA | Lc 32.0 | Non-text elements, placeholder text |
| #307E8F text on white | 4.65:1 | AA | Lc 72.1 | Content text, not long reading |
| #307E8F text on black | 4.50:1 | AA | Lc -29.6 | 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
#E3ECEE
oklch(93.7% 0.01 212.5)
-
Step 200
200
#CBDDE1
oklch(88.5% 0.02 212.6)
-
Step 300
300
#A7C7CF
oklch(80.9% 0.036 214.5)
-
Step 400
400
#77AAB7
oklch(70.7% 0.057 215.4)
-
Step 500
500
#5195A5
oklch(63.1% 0.073 214.8)
-
Step 600
600 (this color)
#307E8F
oklch(55.3% 0.079 214.7)
-
Step 700
700
#236B7B
oklch(49.1% 0.074 215.5)
-
Step 800
800
#1F5764
oklch(42.6% 0.061 215.9)
-
Step 900
900
#204851
oklch(37.7% 0.047 214.4)
-
Step 950
950
#142A30
oklch(27% 0.03 217.4)
#307E8F 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) | #727A90 | 0.071 |
| Deuteranopia (no green cones) | #64708F | 0.064 |
| Tritanopia (no blue cones) | #008483 | 0.035 |
| Achromatopsia (no color) | #747474 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #307E8F
#307E8F
oklch(55.3% 0.079 214.7)
- #9B6153
#9B6153
oklch(55.3% 0.079 34.3)
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 #307E8F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.023
- Cerulean #457B9D ΔE 0.033
- Teal Blue #01889F ΔE 0.033
- Teal #008080 ΔE 0.034
- Deep Aqua #08787F ΔE 0.036
- Stormy Blue #507B9C ΔE 0.039
- Metallic Blue #4F738E ΔE 0.040
- Sea Blue #047495 ΔE 0.041
Use #307E8F 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.