#3D99BF
Closest named color: Faded Blue (#658CBB). oklch(64.4% 0.103 228.9), rgb(61, 153, 191).
Aa
Black text reads best on this color (6.50:1).
About this color
#3D99BF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.103 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 6.50:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.50:1 |
| White text | 3.22:1 |
Values
| HEX | #3D99BF |
| RGB | rgb(61, 153, 191) |
| HSL | hsl(198, 52%, 49%) |
| OKLCH | oklch(64.4% 0.103 228.9) |
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 #3D99BF | 3.22:1 | AA large text | Lc -64.7 | Content text, not long reading |
| Black text on #3D99BF | 6.50:1 | AA | Lc 44.8 | Non-text elements, placeholder text |
| #3D99BF text on white | 3.22:1 | AA large text | Lc 59.2 | Large or bold text, headings |
| #3D99BF text on black | 6.50:1 | AA | Lc -42.5 | 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
#A0C8DB
oklch(81% 0.05 228.5)
-
Step 400
400
#69ABC9
oklch(70.8% 0.08 228.8)
-
Step 500
500 (this color)
#3D99BF
oklch(64.4% 0.103 228.9)
-
Step 600
600
#007EA6
oklch(55.5% 0.11 229.3)
-
Step 700
700
#006A8C
oklch(49% 0.097 229.1)
-
Step 800
800
#005773
oklch(42.7% 0.084 228.5)
-
Step 900
900
#0F485E
oklch(37.7% 0.067 229.1)
-
Step 950
950
#0C2A37
oklch(26.9% 0.043 229.9)
#3D99BF 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) | #8597C1 | 0.073 |
| Deuteranopia (no green cones) | #7389BE | 0.064 |
| Tritanopia (no blue cones) | #00A4A5 | 0.062 |
| Achromatopsia (no color) | #8F8F8F | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D99BF
#3D99BF
oklch(64.4% 0.103 228.9)
- #C07A53
#C07A53
oklch(64.5% 0.103 49.3)
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 #3D99BF, 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 0.053
- Dusty Blue #5A86AD ΔE 0.055
- Cool Blue #4984B8 ΔE 0.058
- Cadet Blue #5F9EA0 ΔE 0.059
- Off Blue #5684AE ΔE 0.059
- Silver Lake Blue #778DA9 ΔE 0.063
- Steel Blue #4682B4 ΔE 0.064
Use #3D99BF 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.