#304197
Closest named color: Cobalt (#1E488F). oklch(41.4% 0.142 270.5), rgb(48, 65, 151).
Aa
White text reads best on this color (9.01:1).
About this color
#304197 is a dark, vivid blue. In OKLCH its lightness is 41%, its chroma 0.142 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.028 away. White text reads best on it, at 9.01:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.32:1 |
| White text | 9.01:1 |
Values
| HEX | #304197 |
| RGB | rgb(48, 65, 151) |
| HSL | hsl(230, 52%, 39%) |
| OKLCH | oklch(41.4% 0.142 270.5) |
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 #304197 | 9.01:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #304197 | 2.32:1 | Fails | Lc 13.6 | Not readable |
| #304197 text on white | 9.01:1 | AAA | Lc 90.3 | Preferred for body text |
| #304197 text on black | 2.32:1 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CDD8F9
oklch(88.4% 0.047 270.8)
-
Step 300
300
#ACBEF7
oklch(80.8% 0.083 270.9)
-
Step 400
400
#819BF3
oklch(70.7% 0.132 270.3)
-
Step 500
500
#647FEF
oklch(63.1% 0.17 270.7)
-
Step 600
600
#4D65DD
oklch(55.5% 0.184 270.7)
-
Step 700
700
#3E53C0
oklch(49% 0.172 270.5)
-
Step 800
800 (this color)
#304197
oklch(41.4% 0.142 270.5)
-
Step 900
900
#2C3B7B
oklch(37.7% 0.11 270.4)
-
Step 950
950
#1A2348
oklch(27% 0.07 270.8)
#304197 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) | #004E9A | 0.042 |
| Deuteranopia (no green cones) | #004495 | 0.035 |
| Tritanopia (no blue cones) | #005665 | 0.117 |
| Achromatopsia (no color) | #494949 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304197
#304197
oklch(41.4% 0.142 270.5)
- #5D4900
#5D4900
oklch(41.5% 0.085 90.7)
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 #304197, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.028
- Blueberry #464196 ΔE 0.031
- Dark Slate Blue #483D8B ΔE 0.040
- Sapphire #2138AB ΔE 0.044
- Dusk Blue #26538D ΔE 0.054
- Light Navy #155084 ΔE 0.058
- Twilight Blue #0A437A ΔE 0.060
- Twilight #4E518B ΔE 0.069
Use #304197 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.