#3998BF
Closest named color: Faded Blue (#658CBB). oklch(64.1% 0.105 229.1), rgb(57, 152, 191).
Aa
Black text reads best on this color (6.41:1).
About this color
#3998BF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.105 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.046 away. Black text reads best on it, at 6.41:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.41:1 |
| White text | 3.27:1 |
Values
| HEX | #3998BF |
| RGB | rgb(57, 152, 191) |
| HSL | hsl(197, 54%, 49%) |
| OKLCH | oklch(64.1% 0.105 229.1) |
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 #3998BF | 3.27:1 | AA large text | Lc -65.2 | Content text, not long reading |
| Black text on #3998BF | 6.41:1 | AA | Lc 44.3 | Non-text elements, placeholder text |
| #3998BF text on white | 3.27:1 | AA large text | Lc 59.7 | Large or bold text, headings |
| #3998BF text on black | 6.41:1 | AA | Lc -42.0 | 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
#E0ECF2
oklch(93.6% 0.015 229)
-
Step 200
200
#C7DDE8
oklch(88.5% 0.028 229.2)
-
Step 300
300
#9FC8DB
oklch(81% 0.051 227.9)
-
Step 400
400
#67ABCA
oklch(70.8% 0.083 229)
-
Step 500
500 (this color)
#3998BF
oklch(64.1% 0.105 229.1)
-
Step 600
600
#007EA6
oklch(55.5% 0.11 229.3)
-
Step 700
700
#006A8C
oklch(49% 0.097 229.1)
-
Step 800
800
#005774
oklch(42.7% 0.085 229.4)
-
Step 900
900
#0D485E
oklch(37.7% 0.068 228.7)
-
Step 950
950
#0B2A37
oklch(26.9% 0.043 229.3)
#3998BF 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) | #8496C1 | 0.074 |
| Deuteranopia (no green cones) | #7188BE | 0.064 |
| Tritanopia (no blue cones) | #00A3A5 | 0.061 |
| Achromatopsia (no color) | #8E8E8E | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3998BF
#3998BF
oklch(64.1% 0.105 229.1)
- #C07851
#C07851
oklch(64.1% 0.105 48.6)
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 #3998BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.046
- Blue NCS #118AB2 ΔE 0.049
- Dusty Blue #5A86AD ΔE 0.053
- Cool Blue #4984B8 ΔE 0.055
- Off Blue #5684AE ΔE 0.057
- Steel Blue #4682B4 ΔE 0.061
- Cadet Blue #5F9EA0 ΔE 0.062
- Water Blue #0E87CC ΔE 0.062
Use #3998BF 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.