#305D9D
Closest named color: Denim Blue (#3B5B92). oklch(47.9% 0.115 257.5), rgb(48, 93, 157).
Aa
White text reads best on this color (6.60:1).
About this color
#305D9D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.115 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.020 away. White text reads best on it, at 6.60:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.17:1 |
| White text | 6.60:1 |
Values
| HEX | #305D9D |
| RGB | rgb(48, 93, 157) |
| HSL | hsl(215, 53%, 40%) |
| OKLCH | oklch(47.9% 0.115 257.5) |
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 #305D9D | 6.60:1 | AA | Lc -87.5 | Fine for body text |
| Black text on #305D9D | 3.17:1 | AA large text | Lc 21.6 | Dividers and decoration only |
| #305D9D text on white | 6.60:1 | AA | Lc 82.4 | Fine for body text |
| #305D9D text on black | 3.17:1 | AA large text | Lc -19.5 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CDDAEE
oklch(88.5% 0.031 258.9)
-
Step 300
300
#AAC2E5
oklch(80.8% 0.056 257.7)
-
Step 400
400
#7DA2D8
oklch(70.6% 0.09 257.7)
-
Step 500
500
#5C8BCE
oklch(63.2% 0.114 257.3)
-
Step 600
600
#4273BA
oklch(55.5% 0.123 257.7)
-
Step 700
700 (this color)
#305D9D
oklch(47.9% 0.115 257.5)
-
Step 800
800
#2B4F82
oklch(42.7% 0.095 257.3)
-
Step 900
900
#274268
oklch(37.7% 0.073 257.1)
-
Step 950
950
#17273D
oklch(27% 0.047 256.6)
#305D9D 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) | #4062A0 | 0.024 |
| Deuteranopia (no green cones) | #2F589C | 0.014 |
| Tritanopia (no blue cones) | #006C75 | 0.092 |
| Achromatopsia (no color) | #5D5D5D | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305D9D
#305D9D
oklch(47.9% 0.115 257.5)
- #7C5500
#7C5500
oklch(48% 0.1 77.9)
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 #305D9D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.020
- Dusky Blue #475F94 ΔE 0.030
- Light Navy Blue #2E5A88 ΔE 0.034
- Denim #3B638C ΔE 0.038
- Dusk Blue #26538D ΔE 0.039
- Peacock Blue #016795 ΔE 0.039
- Mid Blue #276AB3 ΔE 0.046
- Twilight #4E518B ΔE 0.049
Use #305D9D 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.