#136DEF
Closest named color: Cerulean Blue (#056EEE). oklch(56.6% 0.211 259.4), rgb(19, 109, 239).
Aa
White text reads best on this color (4.70:1).
About this color
#136DEF is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.211 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.004 away. White text reads best on it, at 4.70:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.211) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.46:1 |
| White text | 4.70:1 |
Values
| HEX | #136DEF |
| RGB | rgb(19, 109, 239) |
| HSL | hsl(215, 87%, 51%) |
| OKLCH | oklch(56.6% 0.211 259.4) |
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 #136DEF | 4.70:1 | AA | Lc -77.3 | Fine for body text |
| Black text on #136DEF | 4.46:1 | AA large text | Lc 32.2 | Non-text elements, placeholder text |
| #136DEF text on white | 4.70:1 | AA | Lc 71.9 | Content text, not long reading |
| #136DEF text on black | 4.46:1 | AA large text | Lc -29.8 | Dividers and decoration only |
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 600.
-
Step 50
50
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C5DBFD
oklch(88.6% 0.053 259)
-
Step 300
300
#9CC2FE
oklch(80.9% 0.095 259.4)
-
Step 400
400
#65A0FE
oklch(70.8% 0.152 259.3)
-
Step 500
500
#3884FC
oklch(63% 0.194 259.4)
-
Step 600
600 (this color)
#136DEF
oklch(56.6% 0.211 259.4)
-
Step 700
700
#0057CC
oklch(49% 0.195 259.5)
-
Step 800
800
#0648A6
oklch(42.7% 0.163 259.5)
-
Step 900
900
#113E83
oklch(37.7% 0.126 259.3)
-
Step 950
950
#0C254D
oklch(27.1% 0.08 259.5)
#136DEF 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) | #007DF4 | 0.040 |
| Deuteranopia (no green cones) | #006BEC | 0.009 |
| Tritanopia (no blue cones) | #008EA3 | 0.162 |
| Achromatopsia (no color) | #747474 | 0.212 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #136DEF
#136DEF
oklch(56.6% 0.211 259.4)
- #9A6D00
#9A6D00
oklch(56.6% 0.117 80)
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 #136DEF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.004
- Bright Blue #0165FC ΔE 0.028
- Royal Blue #4169E1 ΔE 0.034
- Neon Blue #4361EE ΔE 0.037
- Azul #1D5DEC ΔE 0.037
- Clear Blue #247AFD ΔE 0.040
- Warm Blue #4B57DB ΔE 0.065
- Electric Blue #0652FF ΔE 0.065
Use #136DEF 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.