#305D9B
Closest named color: Denim Blue (#3B5B92). oklch(47.8% 0.112 256.9), rgb(48, 93, 155).
Aa
White text reads best on this color (6.63:1).
About this color
#305D9B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.112 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.017 away. White text reads best on it, at 6.63:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.16:1 |
| White text | 6.63:1 |
Values
| HEX | #305D9B |
| RGB | rgb(48, 93, 155) |
| HSL | hsl(215, 53%, 40%) |
| OKLCH | oklch(47.8% 0.112 256.9) |
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 #305D9B | 6.63:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #305D9B | 3.16:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #305D9B text on white | 6.63:1 | AA | Lc 82.5 | Fine for body text |
| #305D9B text on black | 3.16:1 | AA large text | Lc -19.4 | 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
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CDDAED
oklch(88.4% 0.03 257.8)
-
Step 300
300
#ABC3E4
oklch(81% 0.054 256.4)
-
Step 400
400
#7EA3D7
oklch(70.8% 0.087 256.9)
-
Step 500
500
#5C8BCC
oklch(63.1% 0.111 256.7)
-
Step 600
600
#4274B9
oklch(55.7% 0.121 256.8)
-
Step 700
700 (this color)
#305D9B
oklch(47.8% 0.112 256.9)
-
Step 800
800
#2B4F81
oklch(42.6% 0.093 257)
-
Step 900
900
#274267
oklch(37.6% 0.072 256.6)
-
Step 950
950
#17273D
oklch(27% 0.047 256.6)
#305D9B 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) | #41629D | 0.025 |
| Deuteranopia (no green cones) | #31589A | 0.014 |
| Tritanopia (no blue cones) | #006B74 | 0.089 |
| Achromatopsia (no color) | #5C5C5C | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305D9B
#305D9B
oklch(47.8% 0.112 256.9)
- #7C5400
#7C5400
oklch(47.7% 0.1 76.9)
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 #305D9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.017
- Dusky Blue #475F94 ΔE 0.029
- Light Navy Blue #2E5A88 ΔE 0.031
- Denim #3B638C ΔE 0.035
- Dusk Blue #26538D ΔE 0.037
- Peacock Blue #016795 ΔE 0.038
- Mid Blue #276AB3 ΔE 0.048
- Twilight #4E518B ΔE 0.048
Use #305D9B 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.