#3993BF
Closest named color: Blue NCS (#118AB2). oklch(62.9% 0.107 233.5), rgb(57, 147, 191).
Aa
Black text reads best on this color (6.09:1).
About this color
#3993BF is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.107 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 (0.107) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 6.09:1 |
| White text | 3.44:1 |
Values
| HEX | #3993BF |
| RGB | rgb(57, 147, 191) |
| HSL | hsl(200, 54%, 49%) |
| OKLCH | oklch(62.9% 0.107 233.5) |
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 #3993BF | 3.44:1 | AA large text | Lc -67.1 | Content text, not long reading |
| Black text on #3993BF | 6.09:1 | AA | Lc 42.4 | Non-text elements, placeholder text |
| #3993BF text on white | 3.44:1 | AA large text | Lc 61.7 | Content text, not long reading |
| #3993BF 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
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C7DDEA
oklch(88.5% 0.03 233.6)
-
Step 300
300
#A0C7DD
oklch(80.9% 0.052 233)
-
Step 400
400
#69AACD
oklch(70.8% 0.084 233.2)
-
Step 500
500 (this color)
#3993BF
oklch(62.9% 0.107 233.5)
-
Step 600
600
#007DAC
oklch(55.5% 0.116 233.8)
-
Step 700
700
#006991
oklch(49% 0.102 233.6)
-
Step 800
800
#005678
oklch(42.7% 0.089 233.9)
-
Step 900
900
#104761
oklch(37.6% 0.07 234.2)
-
Step 950
950
#0C2A39
oklch(27% 0.045 233.7)
#3993BF 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) | #7D92C1 | 0.068 |
| Deuteranopia (no green cones) | #6B84BE | 0.058 |
| Tritanopia (no blue cones) | #009FA2 | 0.068 |
| Achromatopsia (no color) | #8A8A8A | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3993BF
#3993BF
oklch(62.9% 0.107 233.5)
- #BB7647
#BB7647
oklch(63% 0.107 53.8)
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 #3993BF, 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 0.040
- Cool Blue #4984B8 ΔE 0.041
- Dusty Blue #5A86AD ΔE 0.044
- Off Blue #5684AE ΔE 0.046
- Steel Blue #4682B4 ΔE 0.047
- Water Blue #0E87CC ΔE 0.049
- Teal Blue #01889F ΔE 0.062
Use #3993BF 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.