#2F45A0
Closest named color: Cobalt (#1E488F). oklch(42.9% 0.15 268.9), rgb(47, 69, 160).
Aa
White text reads best on this color (8.46:1).
About this color
#2F45A0 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.150 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.034 away. White text reads best on it, at 8.46:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.47:1 |
| White text | 8.46:1 |
Values
| HEX | #2F45A0 |
| RGB | rgb(47, 69, 160) |
| HSL | hsl(228, 55%, 41%) |
| OKLCH | oklch(42.9% 0.15 268.9) |
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 #2F45A0 | 8.46:1 | AAA | Lc -93.3 | Preferred for body text |
| Black text on #2F45A0 | 2.47:1 | Fails | Lc 15.3 | Dividers and decoration only |
| #2F45A0 text on white | 8.46:1 | AAA | Lc 88.7 | Fine for body text |
| #2F45A0 text on black | 2.47:1 | Fails | Lc -13.5 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CCD9FA
oklch(88.6% 0.048 268.4)
-
Step 300
300
#A9BFFA
oklch(80.9% 0.087 268.6)
-
Step 400
400
#7D9BF8
oklch(70.7% 0.141 269.1)
-
Step 500
500
#5E7FF4
oklch(63.1% 0.178 269)
-
Step 600
600
#4665E3
oklch(55.6% 0.194 268.8)
-
Step 700
700
#3953C5
oklch(49.2% 0.18 269)
-
Step 800
800 (this color)
#2F45A0
oklch(42.9% 0.15 268.9)
-
Step 900
900
#293B7F
oklch(37.8% 0.117 269)
-
Step 950
950
#18234A
oklch(27% 0.074 269.2)
#2F45A0 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) | #0052A3 | 0.040 |
| Deuteranopia (no green cones) | #00489E | 0.031 |
| Tritanopia (no blue cones) | #005B6B | 0.122 |
| Achromatopsia (no color) | #4D4D4D | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F45A0
#2F45A0
oklch(42.9% 0.15 268.9)
- #634C00
#634C00
oklch(42.9% 0.088 88.6)
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 #2F45A0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.034
- Blueberry #464196 ΔE 0.035
- Sapphire #2138AB ΔE 0.041
- Dark Slate Blue #483D8B ΔE 0.050
- Dusk Blue #26538D ΔE 0.052
- Light Navy #155084 ΔE 0.062
- Blue Blue #2242C7 ΔE 0.064
- Twilight #4E518B ΔE 0.068
Use #2F45A0 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.