#199CEB
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.6% 0.156 243.3), rgb(25, 156, 235).
Aa
Black text reads best on this color (6.99:1).
About this color
#199CEB is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.156 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.029 away. Black text reads best on it, at 6.99:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.99:1 |
| White text | 3.00:1 |
Values
| HEX | #199CEB |
| RGB | rgb(25, 156, 235) |
| HSL | hsl(203, 84%, 51%) |
| OKLCH | oklch(66.6% 0.156 243.3) |
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 #199CEB | 3.00:1 | AA large text | Lc -61.5 | Content text, not long reading |
| Black text on #199CEB | 6.99:1 | AA | Lc 47.9 | Large or bold text, headings |
| #199CEB text on white | 3.00:1 | AA large text | Lc 56.1 | Large or bold text, headings |
| #199CEB text on black | 6.99:1 | AA | Lc -45.7 | Large or bold text, headings |
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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DEECF8
oklch(93.6% 0.022 243.8)
-
Step 200
200
#C2DDF3
oklch(88.5% 0.042 242.7)
-
Step 300
300
#96C7EE
oklch(80.9% 0.076 242.8)
-
Step 400
400
#55A8E6
oklch(70.6% 0.122 243.4)
-
Step 500
500 (this color)
#199CEB
oklch(66.6% 0.156 243.3)
-
Step 600
600
#007ABB
oklch(55.7% 0.134 242.9)
-
Step 700
700
#00669E
oklch(49% 0.119 243.2)
-
Step 800
800
#005483
oklch(42.8% 0.104 243)
-
Step 900
900
#00456E
oklch(37.6% 0.092 243.7)
-
Step 950
950
#012943
oklch(27% 0.064 243.1)
#199CEB 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) | #769FEE | 0.069 |
| Deuteranopia (no green cones) | #598DEA | 0.050 |
| Tritanopia (no blue cones) | #00AFB9 | 0.105 |
| Achromatopsia (no color) | #959595 | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #199CEB
#199CEB
oklch(66.6% 0.156 243.3)
- #D37C00
#D37C00
oklch(66.6% 0.151 63.6)
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 #199CEB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.029
- Dark Sky Blue #448EE4 ΔE 0.039
- Dodger Blue #1E90FF ΔE 0.048
- Cornflower Blue #6495ED ΔE 0.049
- Soft Blue #6488EA ΔE 0.066
- Water Blue #0E87CC ΔE 0.069
- Faded Blue #658CBB ΔE 0.083
- Cool Blue #4984B8 ΔE 0.089
Use #199CEB 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.