#306E9E
Closest named color: Muted Blue (#3B719F). oklch(52% 0.099 244.9), rgb(48, 110, 158).
Aa
White text reads best on this color (5.45:1).
About this color
#306E9E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.099 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Muted Blue (#3B719F), ΔE 0.014 away. White text reads best on it, at 5.45:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Muted Blue (#3B719F) |
| Black text | 3.84:1 |
| White text | 5.45:1 |
Values
| HEX | #306E9E |
| RGB | rgb(48, 110, 158) |
| HSL | hsl(206, 53%, 40%) |
| OKLCH | oklch(52% 0.099 244.9) |
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 #306E9E | 5.45:1 | AA | Lc -82.3 | Fine for body text |
| Black text on #306E9E | 3.84:1 | AA large text | Lc 27.1 | Dividers and decoration only |
| #306E9E text on white | 5.45:1 | AA | Lc 77.0 | Fine for body text |
| #306E9E text on black | 3.84:1 | AA large text | Lc -24.8 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CBDBEA
oklch(88.4% 0.027 246.4)
-
Step 300
300
#A7C5DE
oklch(81% 0.048 243.5)
-
Step 400
400
#78A6CE
oklch(70.7% 0.077 245.4)
-
Step 500
500
#538FC1
oklch(63% 0.098 245.4)
-
Step 600
600
#3579AD
oklch(55.6% 0.106 244.6)
-
Step 700
700 (this color)
#306E9E
oklch(52% 0.099 244.9)
-
Step 800
800
#225379
oklch(42.7% 0.082 245)
-
Step 900
900
#214561
oklch(37.7% 0.064 244.1)
-
Step 950
950
#142839
oklch(26.9% 0.041 245.8)
#306E9E 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) | #586FA0 | 0.043 |
| Deuteranopia (no green cones) | #49659D | 0.033 |
| Tritanopia (no blue cones) | #007A7F | 0.073 |
| Achromatopsia (no color) | #696969 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #306E9E
#306E9E
oklch(52% 0.099 244.9)
- #905C22
#905C22
oklch(52.1% 0.099 65)
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 #306E9E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muted Blue #3B719F ΔE 0.014
- Ocean Blue #03719C ΔE 0.021
- Flat Blue #3C73A8 ΔE 0.024
- Sea Blue #047495 ΔE 0.032
- French Blue #436BAD ΔE 0.033
- Dull Blue #49759C ΔE 0.034
- Peacock Blue #016795 ΔE 0.036
- Denim #3B638C ΔE 0.038
Use #306E9E 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.