#306E91
Closest named color: Sea Blue (#047495). oklch(51.3% 0.084 236.4), rgb(48, 110, 145).
Aa
White text reads best on this color (5.57:1).
About this color
#306E91 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.084 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.023 away. White text reads best on it, at 5.57:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.76:1 |
| White text | 5.57:1 |
Values
| HEX | #306E91 |
| RGB | rgb(48, 110, 145) |
| HSL | hsl(202, 50%, 38%) |
| OKLCH | oklch(51.3% 0.084 236.4) |
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 #306E91 | 5.57:1 | AA | Lc -82.9 | Fine for body text |
| Black text on #306E91 | 3.76:1 | AA large text | Lc 26.4 | Dividers and decoration only |
| #306E91 text on white | 5.57:1 | AA | Lc 77.7 | Fine for body text |
| #306E91 text on black | 3.76:1 | AA large text | Lc -24.1 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CCDCE6
oklch(88.5% 0.022 235)
-
Step 300
300
#A9C5D8
oklch(80.9% 0.041 237.7)
-
Step 400
400
#79A7C4
oklch(70.6% 0.065 236.6)
-
Step 500
500
#5591B5
oklch(63% 0.083 236.5)
-
Step 600
600
#377BA1
oklch(55.6% 0.09 236.1)
-
Step 700
700 (this color)
#306E91
oklch(51.3% 0.084 236.4)
-
Step 800
800
#245470
oklch(42.6% 0.07 237.2)
-
Step 900
900
#22465B
oklch(37.7% 0.055 236.3)
-
Step 950
950
#152935
oklch(27% 0.034 236.3)
#306E91 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) | #5D6D93 | 0.050 |
| Deuteranopia (no green cones) | #506490 | 0.041 |
| Tritanopia (no blue cones) | #00777A | 0.057 |
| Achromatopsia (no color) | #686868 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306E91
#306E91
oklch(51.3% 0.084 236.4)
- #8C5A34
#8C5A34
oklch(51.5% 0.085 56.7)
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 #306E91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.023
- Ocean Blue #03719C ΔE 0.024
- Muted Blue #3B719F ΔE 0.026
- Denim #3B638C ΔE 0.032
- Peacock Blue #016795 ΔE 0.035
- Metallic Blue #4F738E ΔE 0.037
- Dull Blue #49759C ΔE 0.037
- Flat Blue #3C73A8 ΔE 0.040
Use #306E91 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.