#297BC7
Closest named color: Windows Blue (#3778BF). oklch(57.2% 0.14 250.5), rgb(41, 123, 199).
Aa
Black text reads best on this color (4.75:1).
About this color
#297BC7 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.140 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.015 away. Black text reads best on it, at 4.75:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.140) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.75:1 |
| White text | 4.41:1 |
Values
| HEX | #297BC7 |
| RGB | rgb(41, 123, 199) |
| HSL | hsl(209, 66%, 47%) |
| OKLCH | oklch(57.2% 0.14 250.5) |
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 #297BC7 | 4.41:1 | AA large text | Lc -75.7 | Fine for body text |
| Black text on #297BC7 | 4.75:1 | AA | Lc 33.8 | Non-text elements, placeholder text |
| #297BC7 text on white | 4.41:1 | AA large text | Lc 70.2 | Content text, not long reading |
| #297BC7 text on black | 4.75:1 | AA | Lc -31.4 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C8DBF0
oklch(88.4% 0.036 250.9)
-
Step 300
300
#A3C4E9
oklch(80.9% 0.064 251.5)
-
Step 400
400
#6FA5DE
oklch(70.7% 0.102 250.7)
-
Step 500
500
#468DD4
oklch(63% 0.129 250.6)
-
Step 600
600 (this color)
#297BC7
oklch(57.2% 0.14 250.5)
-
Step 700
700
#1463A7
oklch(49.1% 0.13 250.3)
-
Step 800
800
#155187
oklch(42.7% 0.107 250.3)
-
Step 900
900
#19436C
oklch(37.5% 0.084 250.7)
-
Step 950
950
#10283F
oklch(27% 0.053 249.5)
#297BC7 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) | #5780CA | 0.044 |
| Deuteranopia (no green cones) | #3E71C6 | 0.029 |
| Tritanopia (no blue cones) | #008D97 | 0.104 |
| Achromatopsia (no color) | #787878 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #297BC7
#297BC7
oklch(57.2% 0.14 250.5)
- #A56900
#A56900
oklch(57.2% 0.123 70.6)
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 #297BC7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.015
- Water Blue #0E87CC ΔE 0.032
- Nice Blue #107AB0 ΔE 0.039
- Steel Blue #4682B4 ΔE 0.045
- Cool Blue #4984B8 ΔE 0.047
- Flat Blue #3C73A8 ΔE 0.049
- Mid Blue #276AB3 ΔE 0.053
- French Blue #436BAD ΔE 0.054
Use #297BC7 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.