#607C99
Closest named color: Grey Blue (#647D8E). oklch(57.6% 0.055 249.7), rgb(96, 124, 153).
Aa
Black text reads best on this color (4.84:1).
About this color
#607C99 is a medium-dark, muted blue. In OKLCH its lightness is 58%, its chroma 0.055 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.019 away. Black text reads best on it, at 4.84:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 4.84:1 |
| White text | 4.33:1 |
Values
| HEX | #607C99 |
| RGB | rgb(96, 124, 153) |
| HSL | hsl(211, 23%, 49%) |
| OKLCH | oklch(57.6% 0.055 249.7) |
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 #607C99 | 4.33:1 | AA large text | Lc -75.5 | Fine for body text |
| Black text on #607C99 | 4.84:1 | AA | Lc 34.1 | Non-text elements, placeholder text |
| #607C99 text on white | 4.33:1 | AA large text | Lc 70.0 | Content text, not long reading |
| #607C99 text on black | 4.84:1 | AA | Lc -31.7 | 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 600.
-
Step 50
50
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D2DAE2
oklch(88.5% 0.014 248)
-
Step 300
300
#B5C2D0
oklch(80.8% 0.024 250.1)
-
Step 400
400
#8EA3B9
oklch(70.7% 0.04 249.6)
-
Step 500
500
#728CA8
oklch(63% 0.052 250.5)
-
Step 600
600 (this color)
#607C99
oklch(57.6% 0.055 249.7)
-
Step 700
700
#4A637D
oklch(49% 0.052 249.9)
-
Step 800
800
#3D5166
oklch(42.7% 0.043 250.1)
-
Step 900
900
#344353
oklch(37.7% 0.034 250.4)
-
Step 950
950
#1F2730
oklch(26.9% 0.02 251.6)
#607C99 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) | #717D9A | 0.023 |
| Deuteranopia (no green cones) | #6A7798 | 0.018 |
| Tritanopia (no blue cones) | #4D8386 | 0.047 |
| Achromatopsia (no color) | #797979 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #607C99
#607C99
oklch(57.6% 0.055 249.7)
- #8F7455
#8F7455
oklch(57.7% 0.056 70.2)
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 #607C99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.019
- Stormy Blue #507B9C ΔE 0.020
- Slate Gray #708090 ΔE 0.030
- Cerulean #457B9D ΔE 0.031
- Battleship Grey #6B7C85 ΔE 0.033
- Off Blue #5684AE ΔE 0.034
- Dusty Blue #5A86AD ΔE 0.036
- Dull Blue #49759C ΔE 0.037
Use #607C99 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.