#3E99B2
Closest named color: Cadet Blue (#5F9EA0). oklch(63.9% 0.093 219.1), rgb(62, 153, 178).
Aa
Black text reads best on this color (6.40:1).
About this color
#3E99B2 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.093 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.044 away. Black text reads best on it, at 6.40:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.40:1 |
| White text | 3.27:1 |
Values
| HEX | #3E99B2 |
| RGB | rgb(62, 153, 178) |
| HSL | hsl(193, 48%, 47%) |
| OKLCH | oklch(63.9% 0.093 219.1) |
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 #3E99B2 | 3.27:1 | AA large text | Lc -65.3 | Content text, not long reading |
| Black text on #3E99B2 | 6.40:1 | AA | Lc 44.2 | Non-text elements, placeholder text |
| #3E99B2 text on white | 3.27:1 | AA large text | Lc 59.9 | Large or bold text, headings |
| #3E99B2 text on black | 6.40:1 | AA | Lc -41.8 | 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 500.
-
Step 50
50
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECF0
oklch(93.6% 0.013 221.4)
-
Step 200
200
#C8DDE5
oklch(88.4% 0.025 222.6)
-
Step 300
300
#A1C8D5
oklch(80.9% 0.045 220.1)
-
Step 400
400
#6AACBF
oklch(70.7% 0.073 218.2)
-
Step 500
500 (this color)
#3E99B2
oklch(63.9% 0.093 219.1)
-
Step 600
600
#00819B
oklch(55.7% 0.1 218.5)
-
Step 700
700
#006C83
oklch(49.1% 0.089 219.3)
-
Step 800
800
#00586C
oklch(42.6% 0.078 220.2)
-
Step 900
900
#114957
oklch(37.7% 0.06 218.5)
-
Step 950
950
#0D2B33
oklch(27.1% 0.038 218.3)
#3E99B2 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) | #8995B3 | 0.078 |
| Deuteranopia (no green cones) | #7989B2 | 0.070 |
| Tritanopia (no blue cones) | #00A1A1 | 0.046 |
| Achromatopsia (no color) | #8E8E8E | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3E99B2
#3E99B2
oklch(63.9% 0.093 219.1)
- #BC7861
#BC7861
oklch(63.9% 0.092 39.4)
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 #3E99B2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.044
- Sea #3C9992 ΔE 0.050
- Teal Green #0A9396 ΔE 0.052
- Blue NCS #118AB2 ΔE 0.053
- Faded Blue #658CBB ΔE 0.054
- Dusty Blue #5A86AD ΔE 0.055
- Blue Grey #758DA3 ΔE 0.058
- Silver Lake Blue #778DA9 ΔE 0.060
Use #3E99B2 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.