#307591
Closest named color: Sea Blue (#047495). oklch(53.1% 0.081 228.1), rgb(48, 117, 145).
Aa
White text reads best on this color (5.14:1).
About this color
#307591 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 53%, its chroma 0.081 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.020 away. White text reads best on it, at 5.14:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 4.07:1 |
| White text | 5.14:1 |
Values
| HEX | #307591 |
| RGB | rgb(48, 117, 145) |
| HSL | hsl(197, 50%, 38%) |
| OKLCH | oklch(53.1% 0.081 228.1) |
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 #307591 | 5.14:1 | AA | Lc -80.6 | Fine for body text |
| Black text on #307591 | 4.07:1 | AA large text | Lc 28.8 | Dividers and decoration only |
| #307591 text on white | 5.14:1 | AA | Lc 75.2 | Fine for body text |
| #307591 text on black | 4.07:1 | AA large text | Lc -26.5 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBEF
oklch(93.5% 0.01 228.9)
-
Step 200
200
#CCDCE4
oklch(88.5% 0.02 229.1)
-
Step 300
300
#A9C6D3
oklch(80.9% 0.036 226.7)
-
Step 400
400
#7AA8BE
oklch(70.7% 0.059 229.1)
-
Step 500
500
#5693AD
oklch(63.2% 0.074 227.4)
-
Step 600
600 (this color)
#307591
oklch(53.1% 0.081 228.1)
-
Step 700
700
#2A6982
oklch(49.1% 0.075 227.5)
-
Step 800
800
#24566A
oklch(42.8% 0.063 227.3)
-
Step 900
900
#234756
oklch(37.8% 0.049 227.3)
-
Step 950
950
#152932
oklch(26.8% 0.031 228.6)
#307591 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) | #667392 | 0.059 |
| Deuteranopia (no green cones) | #596991 | 0.052 |
| Tritanopia (no blue cones) | #007D7E | 0.049 |
| Achromatopsia (no color) | #6D6D6D | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #307591
#307591
oklch(53.1% 0.081 228.1)
- #925D41
#925D41
oklch(53% 0.081 48.3)
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 #307591, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.020
- Ocean #017B92 ΔE 0.023
- Metallic Blue #4F738E ΔE 0.029
- Muted Blue #3B719F ΔE 0.030
- Dull Blue #49759C ΔE 0.031
- Ocean Blue #03719C ΔE 0.031
- Cerulean #457B9D ΔE 0.032
- Deep Aqua #08787F ΔE 0.039
Use #307591 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.