#2F7BD3
Closest named color: Windows Blue (#3778BF). oklch(58.1% 0.154 254.6), rgb(47, 123, 211).
Aa
Black text reads best on this color (4.89:1).
About this color
#2F7BD3 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.154 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.030 away. Black text reads best on it, at 4.89:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.89:1 |
| White text | 4.29:1 |
Values
| HEX | #2F7BD3 |
| RGB | rgb(47, 123, 211) |
| HSL | hsl(212, 65%, 51%) |
| OKLCH | oklch(58.1% 0.154 254.6) |
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 #2F7BD3 | 4.29:1 | AA large text | Lc -74.7 | Content text, not long reading |
| Black text on #2F7BD3 | 4.89:1 | AA | Lc 34.8 | Non-text elements, placeholder text |
| #2F7BD3 text on white | 4.29:1 | AA large text | Lc 69.3 | Content text, not long reading |
| #2F7BD3 text on black | 4.89:1 | AA | Lc -32.4 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C8DBF3
oklch(88.5% 0.039 254.3)
-
Step 300
300
#A3C3ED
oklch(80.8% 0.069 255.4)
-
Step 400
400
#6FA3E5
oklch(70.6% 0.112 254.9)
-
Step 500
500
#478BDD
oklch(63.1% 0.142 254.5)
-
Step 600
600 (this color)
#2F7BD3
oklch(58.1% 0.154 254.6)
-
Step 700
700
#1860AF
oklch(49.1% 0.143 254.6)
-
Step 800
800
#174F8E
oklch(42.7% 0.119 254.5)
-
Step 900
900
#1A4271
oklch(37.7% 0.092 254.4)
-
Step 950
950
#112742
oklch(27% 0.058 254.7)
#2F7BD3 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) | #5082D6 | 0.036 |
| Deuteranopia (no green cones) | #3273D1 | 0.021 |
| Tritanopia (no blue cones) | #00909D | 0.116 |
| Achromatopsia (no color) | #7A7A7A | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F7BD3
#2F7BD3
oklch(58.1% 0.154 254.6)
- #A56E00
#A56E00
oklch(58.2% 0.123 74.5)
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 #2F7BD3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.030
- Water Blue #0E87CC ΔE 0.037
- Royal Blue #4169E1 ΔE 0.054
- Cool Blue #4984B8 ΔE 0.057
- Nice Blue #107AB0 ΔE 0.058
- Steel Blue #4682B4 ΔE 0.058
- Dark Sky Blue #448EE4 ΔE 0.059
- Cerulean Blue #056EEE ΔE 0.060
Use #2F7BD3 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.