#304687
Closest named color: Cobalt (#1E488F). oklch(41.2% 0.112 267.3), rgb(48, 70, 135).
Aa
White text reads best on this color (8.93:1).
About this color
#304687 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.112 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.021 away. White text reads best on it, at 8.93:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.35:1 |
| White text | 8.93:1 |
Values
| HEX | #304687 |
| RGB | rgb(48, 70, 135) |
| HSL | hsl(225, 48%, 36%) |
| OKLCH | oklch(41.2% 0.112 267.3) |
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 #304687 | 8.93:1 | AAA | Lc -94.7 | Preferred for body text |
| Black text on #304687 | 2.35:1 | Fails | Lc 13.7 | Not readable |
| #304687 text on white | 8.93:1 | AAA | Lc 90.2 | Preferred for body text |
| #304687 text on black | 2.35:1 | Fails | Lc -12.0 | Not readable |
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 800.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CED9F2
oklch(88.5% 0.036 266.7)
-
Step 300
300
#AEC0EC
oklch(80.9% 0.066 267.5)
-
Step 400
400
#849EE2
oklch(70.6% 0.104 267.7)
-
Step 500
500
#6685DA
oklch(63.2% 0.133 267.4)
-
Step 600
600
#4E6DC8
oklch(55.7% 0.145 267.4)
-
Step 700
700
#3F5AAC
oklch(49% 0.135 267.6)
-
Step 800
800 (this color)
#304687
oklch(41.2% 0.112 267.3)
-
Step 900
900
#2D3F70
oklch(37.8% 0.087 267)
-
Step 950
950
#1A2541
oklch(27% 0.055 266.6)
#304687 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) | #264E89 | 0.023 |
| Deuteranopia (no green cones) | #174686 | 0.024 |
| Tritanopia (no blue cones) | #005560 | 0.095 |
| Achromatopsia (no color) | #4A4A4A | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304687
#304687
oklch(41.2% 0.112 267.3)
- #5E4700
#5E4700
oklch(41.1% 0.084 87.4)
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 #304687, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.021
- Light Navy #155084 ΔE 0.035
- Dusk Blue #26538D ΔE 0.037
- Dark Slate Blue #483D8B ΔE 0.041
- Blueberry #464196 ΔE 0.042
- Twilight Blue #0A437A ΔE 0.042
- Deep Sea Blue #015482 ΔE 0.049
- Twilight #4E518B ΔE 0.056
Use #304687 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.