#030AA7
Named color: Cobalt Blue. oklch(33.6% 0.223 264.6), rgb(3, 10, 167).
Aa
White text reads best on this color (13.08:1).
About this color
#030AA7 is a dark, vivid blue. In OKLCH its lightness is 34%, its chroma 0.223 and its hue 265°. Its hue sits on the cool side of the wheel. It is the named color Cobalt Blue. White text reads best on it, at 13.08:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | vivid (0.223) |
| Temperature | cool |
| Nearest name | Cobalt Blue |
| Black text | 1.60:1 |
| White text | 13.08:1 |
Values
| HEX | #030AA7 |
| RGB | rgb(3, 10, 167) |
| HSL | hsl(237, 96%, 33%) |
| OKLCH | oklch(33.6% 0.223 264.6) |
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 #030AA7 | 13.08:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #030AA7 | 1.60:1 | Fails | Lc 0.0 | Not readable |
| #030AA7 text on white | 13.08:1 | AAA | Lc 96.9 | Preferred for body text |
| #030AA7 text on black | 1.60:1 | Fails | Lc 0.0 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C7D9FF
oklch(88.4% 0.056 265.2)
-
Step 300
300
#A2C0FF
oklch(80.9% 0.096 264.7)
-
Step 400
400
#719DFF
oklch(70.8% 0.152 264.6)
-
Step 500
500
#4C80FF
oklch(63.2% 0.197 264.6)
-
Step 600
600
#275FFF
oklch(55.7% 0.244 264.5)
-
Step 700
700
#0B37FF
oklch(49.1% 0.287 264.7)
-
Step 800
800
#060EE8
oklch(42.7% 0.287 264.6)
-
Step 900
900 (this color)
#030AA7
oklch(33.6% 0.223 264.6)
-
Step 950
950
#03196A
oklch(27.1% 0.141 264.4)
#030AA7 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) | #0039AB | 0.074 |
| Deuteranopia (no green cones) | #0027A5 | 0.035 |
| Tritanopia (no blue cones) | #004561 | 0.166 |
| Achromatopsia (no color) | #313131 | 0.225 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #030AA7
#030AA7
oklch(33.6% 0.223 264.6)
- #473300
#473300
oklch(33.5% 0.069 84.4)
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 #030AA7, closest first.
No curated palette has a color within ΔE 0.04 of #030AA7.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ultramarine #2000B1 ΔE 0.031
- Royal #0C1793 ΔE 0.035
- Dark Blue #00008B ΔE 0.054
- Medium Blue #0000CD ΔE 0.064
- True Blue #010FCC ΔE 0.065
- Navy #000080 ΔE 0.074
- Indigo Blue #3A18B1 ΔE 0.077
- Sapphire #2138AB ΔE 0.082
Use #030AA7 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.