#306E88
Closest named color: Sea Blue (#047495). oklch(50.9% 0.075 228.5), rgb(48, 110, 136).
Aa
White text reads best on this color (5.65:1).
About this color
#306E88 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 51%, its chroma 0.075 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.027 away. White text reads best on it, at 5.65:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.71:1 |
| White text | 5.65:1 |
Values
| HEX | #306E88 |
| RGB | rgb(48, 110, 136) |
| HSL | hsl(198, 48%, 36%) |
| OKLCH | oklch(50.9% 0.075 228.5) |
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 #306E88 | 5.65:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #306E88 | 3.71:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #306E88 text on white | 5.65:1 | AA | Lc 78.1 | Fine for body text |
| #306E88 text on black | 3.71:1 | AA large text | Lc -23.7 | 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
#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
#A9C6D4
oklch(81% 0.037 228.5)
-
Step 400
400
#7AA8BE
oklch(70.7% 0.059 229.1)
-
Step 500
500
#5692AD
oklch(63% 0.074 228.7)
-
Step 600
600
#397C99
oklch(55.5% 0.081 229.1)
-
Step 700
700 (this color)
#306E88
oklch(50.9% 0.075 228.5)
-
Step 800
800
#25556A
oklch(42.6% 0.062 229.4)
-
Step 900
900
#234756
oklch(37.8% 0.049 227.3)
-
Step 950
950
#152932
oklch(26.8% 0.031 228.6)
#306E88 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) | #606C89 | 0.054 |
| Deuteranopia (no green cones) | #546388 | 0.048 |
| Tritanopia (no blue cones) | #007576 | 0.047 |
| Achromatopsia (no color) | #676767 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306E88
#306E88
oklch(50.9% 0.075 228.5)
- #89583E
#89583E
oklch(50.8% 0.076 48.4)
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 #306E88, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.027
- Ocean Blue #03719C ΔE 0.034
- Denim #3B638C ΔE 0.036
- Metallic Blue #4F738E ΔE 0.038
- Muted Blue #3B719F ΔE 0.039
- Ocean #017B92 ΔE 0.039
- Deep Aqua #08787F ΔE 0.041
- Peacock Blue #016795 ΔE 0.041
Use #306E88 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.