#30438F
Closest named color: Cobalt (#1E488F). oklch(41.2% 0.128 269.5), rgb(48, 67, 143).
Aa
White text reads best on this color (9.03:1).
About this color
#30438F is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.128 and its hue 269°. 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 9.03:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.32:1 |
| White text | 9.03:1 |
Values
| HEX | #30438F |
| RGB | rgb(48, 67, 143) |
| HSL | hsl(228, 50%, 37%) |
| OKLCH | oklch(41.2% 0.128 269.5) |
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 #30438F | 9.03:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #30438F | 2.32:1 | Fails | Lc 13.5 | Not readable |
| #30438F text on white | 9.03:1 | AAA | Lc 90.4 | Preferred for body text |
| #30438F text on black | 2.32:1 | Fails | Lc -11.9 | 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
#E4EAF9
oklch(93.7% 0.021 268.4)
-
Step 200
200
#CED9F5
oklch(88.6% 0.04 268.5)
-
Step 300
300
#ADBFF2
oklch(80.9% 0.075 269.5)
-
Step 400
400
#839CEB
oklch(70.6% 0.12 269.8)
-
Step 500
500
#6582E5
oklch(63.1% 0.152 269.4)
-
Step 600
600
#4E69D3
oklch(55.6% 0.166 269.6)
-
Step 700
700
#3F57B7
oklch(49.2% 0.154 269.4)
-
Step 800
800 (this color)
#30438F
oklch(41.2% 0.128 269.5)
-
Step 900
900
#2D3D76
oklch(37.8% 0.099 269.4)
-
Step 950
950
#1A2445
oklch(27% 0.063 269.2)
#30438F 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) | #154D92 | 0.032 |
| Deuteranopia (no green cones) | #00458D | 0.035 |
| Tritanopia (no blue cones) | #005562 | 0.107 |
| Achromatopsia (no color) | #494949 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #30438F
#30438F
oklch(41.2% 0.128 269.5)
- #5D4800
#5D4800
oklch(41.2% 0.084 89.5)
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 #30438F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.021
- Blueberry #464196 ΔE 0.033
- Dark Slate Blue #483D8B ΔE 0.037
- Dusk Blue #26538D ΔE 0.045
- Light Navy #155084 ΔE 0.047
- Twilight Blue #0A437A ΔE 0.050
- Sapphire #2138AB ΔE 0.057
- Deep Sea Blue #015482 ΔE 0.061
Use #30438F 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.