#3993BE
Closest named color: Blue NCS (#118AB2). oklch(62.8% 0.106 232.9), rgb(57, 147, 190).
Aa
Black text reads best on this color (6.09:1).
About this color
#3993BE is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.106 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.038 away. Black text reads best on it, at 6.09:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 6.09:1 |
| White text | 3.44:1 |
Values
| HEX | #3993BE |
| RGB | rgb(57, 147, 190) |
| HSL | hsl(199, 54%, 48%) |
| OKLCH | oklch(62.8% 0.106 232.9) |
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 #3993BE | 3.44:1 | AA large text | Lc -67.2 | Content text, not long reading |
| Black text on #3993BE | 6.09:1 | AA | Lc 42.4 | Non-text elements, placeholder text |
| #3993BE text on white | 3.44:1 | AA large text | Lc 61.7 | Content text, not long reading |
| #3993BE text on black | 6.09:1 | AA | Lc -40.0 | 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 500.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C7DDE9
oklch(88.5% 0.029 231.5)
-
Step 300
300
#A0C7DD
oklch(80.9% 0.052 233)
-
Step 400
400
#69AACC
oklch(70.7% 0.083 232.5)
-
Step 500
500 (this color)
#3993BE
oklch(62.8% 0.106 232.9)
-
Step 600
600
#007DAB
oklch(55.5% 0.115 233.2)
-
Step 700
700
#006990
oklch(49% 0.101 232.9)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900
#104760
oklch(37.6% 0.069 233.2)
-
Step 950
950
#0C2A38
oklch(27% 0.044 231.9)
#3993BE 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) | #7E91C0 | 0.069 |
| Deuteranopia (no green cones) | #6C84BD | 0.059 |
| Tritanopia (no blue cones) | #009FA1 | 0.068 |
| Achromatopsia (no color) | #8A8A8A | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3993BE
#3993BE
oklch(62.8% 0.106 232.9)
- #BA7548
#BA7548
oklch(62.7% 0.106 52.8)
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 #3993BE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.038
- Faded Blue #658CBB ΔE 0.041
- Cool Blue #4984B8 ΔE 0.041
- Dusty Blue #5A86AD ΔE 0.043
- Off Blue #5684AE ΔE 0.045
- Steel Blue #4682B4 ΔE 0.047
- Water Blue #0E87CC ΔE 0.050
- Teal Blue #01889F ΔE 0.061
Use #3993BE 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.