#30457D
Closest named color: Cobalt (#1E488F). oklch(40.3% 0.098 266.6), rgb(48, 69, 125).
Aa
White text reads best on this color (9.23:1).
About this color
#30457D is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.098 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.033 away. White text reads best on it, at 9.23:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.27:1 |
| White text | 9.23:1 |
Values
| HEX | #30457D |
| RGB | rgb(48, 69, 125) |
| HSL | hsl(224, 45%, 34%) |
| OKLCH | oklch(40.3% 0.098 266.6) |
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 #30457D | 9.23:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #30457D | 2.27:1 | Fails | Lc 12.8 | Not readable |
| #30457D text on white | 9.23:1 | AAA | Lc 91.1 | Preferred for body text |
| #30457D text on black | 2.27:1 | Fails | Lc -11.2 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#CFD9EF
oklch(88.4% 0.032 266.1)
-
Step 300
300
#B0C0E7
oklch(80.9% 0.058 267.6)
-
Step 400
400
#869FDA
oklch(70.6% 0.091 266.4)
-
Step 500
500
#6986D0
oklch(63% 0.117 266.8)
-
Step 600
600
#516FBD
oklch(55.6% 0.126 266.5)
-
Step 700
700
#425CA3
oklch(49% 0.118 266.9)
-
Step 800
800 (this color)
#30457D
oklch(40.3% 0.098 266.6)
-
Step 900
900
#2F406A
oklch(37.8% 0.075 266.2)
-
Step 950
950
#1C253E
oklch(26.9% 0.049 268)
#30457D 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) | #2C4B7F | 0.017 |
| Deuteranopia (no green cones) | #21447C | 0.018 |
| Tritanopia (no blue cones) | #00525B | 0.086 |
| Achromatopsia (no color) | #474747 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #30457D
#30457D
oklch(40.3% 0.098 266.6)
- #5C4500
#5C4500
oklch(40.4% 0.083 86.9)
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 #30457D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.033
- Twilight Blue #0A437A ΔE 0.035
- Light Navy #155084 ΔE 0.036
- Dusk Blue #26538D ΔE 0.044
- Dark Slate Blue #483D8B ΔE 0.047
- Deep Sea Blue #015482 ΔE 0.049
- Blueberry #464196 ΔE 0.054
- Dark Grey Blue #29465B ΔE 0.061
Use #30457D 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.