#30407D
Closest named color: Twilight Blue (#0A437A). oklch(39.2% 0.105 270), rgb(48, 64, 125).
Aa
White text reads best on this color (9.74:1).
About this color
#30407D is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.105 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.034 away. White text reads best on it, at 9.74:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.15:1 |
| White text | 9.74:1 |
Values
| HEX | #30407D |
| RGB | rgb(48, 64, 125) |
| HSL | hsl(228, 45%, 34%) |
| OKLCH | oklch(39.2% 0.105 270) |
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 #30407D | 9.74:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #30407D | 2.15:1 | Fails | Lc 11.6 | Not readable |
| #30407D text on white | 9.74:1 | AAA | Lc 92.4 | Preferred for body text |
| #30407D text on black | 2.15:1 | Fails | Lc -10.0 | 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 900.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4EAFA
oklch(93.7% 0.023 269.4)
-
Step 200
200
#CED8F7
oklch(88.4% 0.044 271.3)
-
Step 300
300
#ADBFF4
oklch(81% 0.078 270)
-
Step 400
400
#829CEF
oklch(70.7% 0.125 269.8)
-
Step 500
500
#6481EA
oklch(63.2% 0.161 269.7)
-
Step 600
600
#4D67D8
oklch(55.5% 0.175 270.1)
-
Step 700
700
#3E55BB
oklch(49% 0.162 269.9)
-
Step 800
800
#334697
oklch(42.6% 0.134 269.9)
-
Step 900
900 (this color)
#30407D
oklch(39.2% 0.105 270)
-
Step 950
950
#1A2447
oklch(27.1% 0.066 269.6)
#30407D 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) | #23487F | 0.025 |
| Deuteranopia (no green cones) | #16417C | 0.027 |
| Tritanopia (no blue cones) | #004E58 | 0.092 |
| Achromatopsia (no color) | #444444 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #30407D
#30407D
oklch(39.2% 0.105 270)
- #564300
#564300
oklch(39.2% 0.08 90.3)
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 #30407D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.034
- Cobalt #1E488F ΔE 0.037
- Dark Slate Blue #483D8B ΔE 0.044
- Light Navy #155084 ΔE 0.048
- Blueberry #464196 ΔE 0.054
- Dusk Blue #26538D ΔE 0.056
- Deep Sea Blue #015482 ΔE 0.061
- Marine Blue #01386A ΔE 0.061
Use #30407D 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.