#306A8D
Closest named color: Denim (#3B638C). oklch(50.1% 0.082 238), rgb(48, 106, 141).
Aa
White text reads best on this color (5.87:1).
About this color
#306A8D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.082 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.022 away. White text reads best on it, at 5.87:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.57:1 |
| White text | 5.87:1 |
Values
| HEX | #306A8D |
| RGB | rgb(48, 106, 141) |
| HSL | hsl(203, 49%, 37%) |
| OKLCH | oklch(50.1% 0.082 238) |
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 #306A8D | 5.87:1 | AA | Lc -84.4 | Fine for body text |
| Black text on #306A8D | 3.57:1 | AA large text | Lc 24.9 | Dividers and decoration only |
| #306A8D text on white | 5.87:1 | AA | Lc 79.2 | Fine for body text |
| #306A8D text on black | 3.57:1 | AA large text | Lc -22.6 | 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 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
#AAC5D8
oklch(80.9% 0.04 238.7)
-
Step 400
400
#7BA7C4
oklch(70.7% 0.064 237.7)
-
Step 500
500
#5891B5
oklch(63.2% 0.081 237.7)
-
Step 600
600
#3B7AA1
oklch(55.5% 0.089 238.4)
-
Step 700
700 (this color)
#306A8D
oklch(50.1% 0.082 238)
-
Step 800
800
#265470
oklch(42.7% 0.069 238)
-
Step 900
900
#24465B
oklch(37.8% 0.054 237.6)
-
Step 950
950
#162935
oklch(27.1% 0.033 237.5)
#306A8D 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) | #5A6A8F | 0.047 |
| Deuteranopia (no green cones) | #4D608C | 0.039 |
| Tritanopia (no blue cones) | #007376 | 0.058 |
| Achromatopsia (no color) | #646464 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306A8D
#306A8D
oklch(50.1% 0.082 238)
- #875731
#875731
oklch(50.2% 0.083 57.7)
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 #306A8D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.022
- Peacock Blue #016795 ΔE 0.029
- Ocean Blue #03719C ΔE 0.030
- Sea Blue #047495 ΔE 0.032
- Muted Blue #3B719F ΔE 0.035
- Dusky Blue #475F94 ΔE 0.042
- Metallic Blue #4F738E ΔE 0.045
- Denim Blue #3B5B92 ΔE 0.047
Use #306A8D 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.