#2A307F
Closest named color: Marine Blue (#01386A). oklch(35.6% 0.132 274.2), rgb(42, 48, 127).
Aa
White text reads best on this color (11.48:1).
About this color
#2A307F is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.132 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.056 away. White text reads best on it, at 11.48:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.82:1 |
| White text | 11.48:1 |
Values
| HEX | #2A307F |
| RGB | rgb(42, 48, 127) |
| HSL | hsl(236, 50%, 33%) |
| OKLCH | oklch(35.6% 0.132 274.2) |
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 #2A307F | 11.48:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #2A307F | 1.82:1 | Fails | Lc 7.8 | Not readable |
| #2A307F text on white | 11.48:1 | AAA | Lc 96.0 | Preferred for body text |
| #2A307F text on black | 1.82:1 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E4E9FE
oklch(93.7% 0.029 275.2)
-
Step 200
200
#CED7FE
oklch(88.5% 0.055 275)
-
Step 300
300
#ADBCFF
oklch(80.8% 0.096 274.3)
-
Step 400
400
#8497FF
oklch(70.7% 0.153 274)
-
Step 500
500
#6878FF
oklch(63.1% 0.199 274.1)
-
Step 600
600
#535BF0
oklch(55.6% 0.22 274.3)
-
Step 700
700
#444AD1
oklch(49.2% 0.203 274.1)
-
Step 800
800
#383EA9
oklch(42.8% 0.168 274.3)
-
Step 900
900 (this color)
#2A307F
oklch(35.6% 0.132 274.2)
-
Step 950
950
#1B214E
oklch(27.1% 0.082 273.9)
#2A307F 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) | #003D82 | 0.043 |
| Deuteranopia (no green cones) | #00367D | 0.037 |
| Tritanopia (no blue cones) | #004452 | 0.111 |
| Achromatopsia (no color) | #393939 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A307F
#2A307F
oklch(35.6% 0.132 274.2)
- #483B00
#483B00
oklch(35.6% 0.073 95)
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 #2A307F, closest first.
No curated palette has a color within ΔE 0.04 of #2A307F.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.056
- Twilight Blue #0A437A ΔE 0.056
- Dark Slate Blue #483D8B ΔE 0.065
- Cobalt #1E488F ΔE 0.067
- Marine #042E60 ΔE 0.069
- Midnight Blue #191970 ΔE 0.069
- Royal #0C1793 ΔE 0.072
- Blueberry #464196 ΔE 0.075
Use #2A307F 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.