#007BCD
Closest named color: Windows Blue (#3778BF). oklch(57% 0.155 248.3), rgb(0, 123, 205).
Aa
Black text reads best on this color (4.71:1).
About this color
#007BCD is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.155 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.029 away. Black text reads best on it, at 4.71:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.71:1 |
| White text | 4.45:1 |
Values
| HEX | #007BCD |
| RGB | rgb(0, 123, 205) |
| HSL | hsl(204, 100%, 40%) |
| OKLCH | oklch(57% 0.155 248.3) |
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 #007BCD | 4.45:1 | AA large text | Lc -75.7 | Fine for body text |
| Black text on #007BCD | 4.71:1 | AA | Lc 33.9 | Non-text elements, placeholder text |
| #007BCD text on white | 4.45:1 | AA large text | Lc 70.2 | Content text, not long reading |
| #007BCD text on black | 4.71:1 | AA | Lc -31.5 | 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
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C6DCF2
oklch(88.5% 0.038 248.3)
-
Step 300
300
#9EC5EC
oklch(80.9% 0.069 248.7)
-
Step 400
400
#66A6E3
oklch(70.7% 0.112 248.6)
-
Step 500
500
#358EDB
oklch(63.1% 0.143 248.5)
-
Step 600
600 (this color)
#007BCD
oklch(57% 0.155 248.3)
-
Step 700
700
#0064A8
oklch(49.2% 0.133 248.3)
-
Step 800
800
#00518B
oklch(42.6% 0.117 248.8)
-
Step 900
900
#0D4470
oklch(37.7% 0.093 248.2)
-
Step 950
950
#0B2842
oklch(27% 0.059 248.9)
#007BCD 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) | #5280D0 | 0.051 |
| Deuteranopia (no green cones) | #3170CB | 0.031 |
| Tritanopia (no blue cones) | #008F9A | 0.110 |
| Achromatopsia (no color) | #777777 | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #007BCD
#007BCD
oklch(57% 0.155 248.3)
- #A66700
#A66700
oklch(57% 0.125 68.5)
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 #007BCD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.029
- Water Blue #0E87CC ΔE 0.035
- Nice Blue #107AB0 ΔE 0.045
- Mid Blue #276AB3 ΔE 0.056
- Steel Blue #4682B4 ΔE 0.059
- Cool Blue #4984B8 ΔE 0.060
- Flat Blue #3C73A8 ΔE 0.060
- French Blue #436BAD ΔE 0.063
Use #007BCD 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.