#30437F
Closest named color: Cobalt (#1E488F). oklch(40% 0.104 268.2), rgb(48, 67, 127).
Aa
White text reads best on this color (9.39:1).
About this color
#30437F is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.104 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.032 away. White text reads best on it, at 9.39:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.23:1 |
| White text | 9.39:1 |
Values
| HEX | #30437F |
| RGB | rgb(48, 67, 127) |
| HSL | hsl(226, 45%, 34%) |
| OKLCH | oklch(40% 0.104 268.2) |
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 #30437F | 9.39:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #30437F | 2.23:1 | Fails | Lc 12.4 | Not readable |
| #30437F text on white | 9.39:1 | AAA | Lc 91.5 | Preferred for body text |
| #30437F text on black | 2.23:1 | Fails | Lc -10.9 | 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 900.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CDD9F7
oklch(88.6% 0.043 268.2)
-
Step 300
300
#ABBFF4
oklch(80.8% 0.078 268.5)
-
Step 400
400
#809DEE
oklch(70.8% 0.123 268.2)
-
Step 500
500
#6182E9
oklch(63.1% 0.159 268.2)
-
Step 600
600
#4969D7
oklch(55.6% 0.173 268.2)
-
Step 700
700
#3B57BA
oklch(49.2% 0.159 268.1)
-
Step 800
800
#314797
oklch(42.7% 0.134 268.6)
-
Step 900
900 (this color)
#30437F
oklch(40% 0.104 268.2)
-
Step 950
950
#192446
oklch(27% 0.065 268.3)
#30437F 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) | #274A81 | 0.021 |
| Deuteranopia (no green cones) | #1B437E | 0.022 |
| Tritanopia (no blue cones) | #00515B | 0.090 |
| Achromatopsia (no color) | #464646 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #30437F
#30437F
oklch(40% 0.104 268.2)
- #5A4400
#5A4400
oklch(39.9% 0.082 87.6)
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 #30437F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.032
- Twilight Blue #0A437A ΔE 0.035
- Light Navy #155084 ΔE 0.040
- Dark Slate Blue #483D8B ΔE 0.044
- Dusk Blue #26538D ΔE 0.048
- Blueberry #464196 ΔE 0.051
- Deep Sea Blue #015482 ΔE 0.054
- Twilight #4E518B ΔE 0.064
Use #30437F 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.