#135D9D
Closest named color: Denim Blue (#3B5B92). oklch(47% 0.124 250.3), rgb(19, 93, 157).
Aa
White text reads best on this color (6.81:1).
About this color
#135D9D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.124 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.033 away. White text reads best on it, at 6.81:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.08:1 |
| White text | 6.81:1 |
Values
| HEX | #135D9D |
| RGB | rgb(19, 93, 157) |
| HSL | hsl(208, 78%, 35%) |
| OKLCH | oklch(47% 0.124 250.3) |
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 #135D9D | 6.81:1 | AA | Lc -88.1 | Fine for body text |
| Black text on #135D9D | 3.08:1 | AA large text | Lc 21.0 | Dividers and decoration only |
| #135D9D text on white | 6.81:1 | AA | Lc 83.1 | Fine for body text |
| #135D9D text on black | 3.08:1 | AA large text | Lc -18.9 | 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 700.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#C9DBEF
oklch(88.4% 0.034 251)
-
Step 300
300
#A4C4E7
oklch(80.9% 0.061 250.9)
-
Step 400
400
#72A5DA
oklch(70.7% 0.095 250.2)
-
Step 500
500
#4A8ED1
oklch(63.2% 0.123 250.1)
-
Step 600
600
#2A76BE
oklch(55.6% 0.134 250.7)
-
Step 700
700 (this color)
#135D9D
oklch(47% 0.124 250.3)
-
Step 800
800
#1A5185
oklch(42.7% 0.103 250.7)
-
Step 900
900
#1C446A
oklch(37.8% 0.079 249.7)
-
Step 950
950
#12283E
oklch(27.1% 0.05 250.2)
#135D9D 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) | #3D61A0 | 0.037 |
| Deuteranopia (no green cones) | #26559C | 0.023 |
| Tritanopia (no blue cones) | #006C75 | 0.090 |
| Achromatopsia (no color) | #5B5B5B | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #135D9D
#135D9D
oklch(47% 0.124 250.3)
- #7E4F00
#7E4F00
oklch(47% 0.101 70.5)
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 #135D9D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.033
- Peacock Blue #016795 ΔE 0.035
- Dusk Blue #26538D ΔE 0.035
- Light Navy Blue #2E5A88 ΔE 0.036
- Denim #3B638C ΔE 0.047
- Dusky Blue #475F94 ΔE 0.048
- Deep Sea Blue #015482 ΔE 0.050
- Mid Blue #276AB3 ΔE 0.051
Use #135D9D 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.