#639ED7
Closest named color: Cornflower Blue (#6495ED). oklch(68.2% 0.105 248.8), rgb(99, 158, 215).
Aa
Black text reads best on this color (7.40:1).
About this color
#639ED7 is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.105 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.046 away. Black text reads best on it, at 7.40:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.40:1 |
| White text | 2.83:1 |
Values
| HEX | #639ED7 |
| RGB | rgb(99, 158, 215) |
| HSL | hsl(209, 59%, 62%) |
| OKLCH | oklch(68.2% 0.105 248.8) |
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 #639ED7 | 2.83:1 | Fails | Lc -59.6 | Large or bold text, headings |
| Black text on #639ED7 | 7.40:1 | AAA | Lc 49.8 | Large or bold text, headings |
| #639ED7 text on white | 2.83:1 | Fails | Lc 54.3 | Large or bold text, headings |
| #639ED7 text on black | 7.40:1 | AAA | Lc -47.5 | Large or bold text, headings |
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 400.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF6
oklch(93.5% 0.019 248)
-
Step 200
200
#C7DCF1
oklch(88.5% 0.037 248.2)
-
Step 300
300
#A0C5EA
oklch(80.9% 0.066 248.6)
-
Step 400
400 (this color)
#639ED7
oklch(68.2% 0.105 248.8)
-
Step 500
500
#3E8ED6
oklch(63% 0.134 248.7)
-
Step 600
600
#1377C4
oklch(55.7% 0.146 248.8)
-
Step 700
700
#0063A9
oklch(49% 0.136 249.1)
-
Step 800
800
#095189
oklch(42.6% 0.113 249.1)
-
Step 900
900
#14446E
oklch(37.8% 0.088 249)
-
Step 950
950
#0E2840
oklch(27% 0.055 249)
#639ED7 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) | #86A0DA | 0.041 |
| Deuteranopia (no green cones) | #7794D6 | 0.032 |
| Tritanopia (no blue cones) | #18ABB2 | 0.089 |
| Achromatopsia (no color) | #999999 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #639ED7
#639ED7
oklch(68.2% 0.105 248.8)
- #C38C4C
#C38C4C
oklch(68.1% 0.105 68.6)
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 #639ED7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.046
- Chefchaouen Blue #4895EF ΔE 0.054
- Faded Blue #658CBB ΔE 0.057
- Greyblue #77A1B5 ΔE 0.057
- Dark Sky Blue #448EE4 ΔE 0.062
- Bluegrey #85A3B2 ΔE 0.070
- Bluey Grey #89A0B0 ΔE 0.072
- Soft Blue #6488EA ΔE 0.072
Use #639ED7 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.