#3980CB
Closest named color: Water Blue (#0E87CC). oklch(59.1% 0.135 252.2), rgb(57, 128, 203).
Aa
Black text reads best on this color (5.12:1).
About this color
#3980CB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.135 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.025 away. Black text reads best on it, at 5.12:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.12:1 |
| White text | 4.09:1 |
Values
| HEX | #3980CB |
| RGB | rgb(57, 128, 203) |
| HSL | hsl(211, 58%, 51%) |
| OKLCH | oklch(59.1% 0.135 252.2) |
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 #3980CB | 4.09:1 | AA large text | Lc -73.3 | Content text, not long reading |
| Black text on #3980CB | 5.12:1 | AA | Lc 36.3 | Non-text elements, placeholder text |
| #3980CB text on white | 4.09:1 | AA large text | Lc 67.8 | Content text, not long reading |
| #3980CB text on black | 5.12:1 | AA | Lc -33.8 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CADBEF
oklch(88.5% 0.033 252.5)
-
Step 300
300
#A5C4E8
oklch(81% 0.061 252.4)
-
Step 400
400
#73A4DC
oklch(70.6% 0.098 252.5)
-
Step 500
500
#4D8DD2
oklch(63.2% 0.124 251.9)
-
Step 600
600 (this color)
#3980CB
oklch(59.1% 0.135 252.2)
-
Step 700
700
#2062A5
oklch(49% 0.126 252.3)
-
Step 800
800
#1D5086
oklch(42.6% 0.105 252.7)
-
Step 900
900
#1E436B
oklch(37.7% 0.081 252.3)
-
Step 950
950
#12283F
oklch(27.1% 0.051 251.2)
#3980CB 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) | #5E85CE | 0.040 |
| Deuteranopia (no green cones) | #4877CA | 0.025 |
| Tritanopia (no blue cones) | #00929C | 0.103 |
| Achromatopsia (no color) | #7D7D7D | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3980CB
#3980CB
oklch(59.1% 0.135 252.2)
- #AB6F00
#AB6F00
oklch(59.1% 0.127 72.1)
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 #3980CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.025
- Windows Blue #3778BF ΔE 0.027
- Cool Blue #4984B8 ΔE 0.036
- Steel Blue #4682B4 ΔE 0.038
- Nice Blue #107AB0 ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.052
- Off Blue #5684AE ΔE 0.055
- Blue NCS #118AB2 ΔE 0.057
Use #3980CB 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.