#2F479C
Closest named color: Cobalt (#1E488F). oklch(42.9% 0.141 268.1), rgb(47, 71, 156).
Aa
White text reads best on this color (8.39:1).
About this color
#2F479C is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.141 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.028 away. White text reads best on it, at 8.39:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.50:1 |
| White text | 8.39:1 |
Values
| HEX | #2F479C |
| RGB | rgb(47, 71, 156) |
| HSL | hsl(227, 54%, 40%) |
| OKLCH | oklch(42.9% 0.141 268.1) |
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 #2F479C | 8.39:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #2F479C | 2.50:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #2F479C text on white | 8.39:1 | AAA | Lc 88.6 | Fine for body text |
| #2F479C text on black | 2.50:1 | Fails | Lc -13.6 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CCD9F8
oklch(88.5% 0.045 267.4)
-
Step 300
300
#AABFF7
oklch(80.9% 0.083 268.6)
-
Step 400
400
#7D9CF3
oklch(70.6% 0.132 268.1)
-
Step 500
500
#5E81EF
oklch(63.2% 0.169 268)
-
Step 600
600
#4667DD
oklch(55.5% 0.184 268.1)
-
Step 700
700
#3855C0
oklch(49.1% 0.171 268)
-
Step 800
800 (this color)
#2F479C
oklch(42.9% 0.141 268.1)
-
Step 900
900
#293C7B
oklch(37.7% 0.11 268.2)
-
Step 950
950
#182448
oklch(27.1% 0.069 267.8)
#2F479C 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) | #08539F | 0.037 |
| Deuteranopia (no green cones) | #00499A | 0.031 |
| Tritanopia (no blue cones) | #005B6A | 0.115 |
| Achromatopsia (no color) | #4D4D4D | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F479C
#2F479C
oklch(42.9% 0.141 268.1)
- #644C00
#644C00
oklch(43% 0.088 87.7)
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 #2F479C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.028
- Blueberry #464196 ΔE 0.033
- Dusk Blue #26538D ΔE 0.044
- Dark Slate Blue #483D8B ΔE 0.047
- Sapphire #2138AB ΔE 0.048
- Light Navy #155084 ΔE 0.054
- Twilight #4E518B ΔE 0.061
- Denim Blue #3B5B92 ΔE 0.064
Use #2F479C 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.